docs: mention being in @beta (#1904)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1903
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

🎁

README.md

@@ -25,6 +25,10 @@ It includes options not just for building and testing but also automated release
 
 ## Usage
 
+> **Note:** create-typescript-app is preparing to promote 2.0 beta version to stable soon.
+> The repository's `main` branch shows commands for the `beta` version.
+> The published package's 1.x versions still show commands for the 1.x version.
+
 First make sure you have the following installed:
 
 - [Node.js](https://nodejs.org)
@@ -34,7 +38,7 @@ First make sure you have the following installed:
 Then in an existing repository or in your directory where you'd like to make a new repository:
 
 ```shell
-npx create typescript-app
+npx create typescript-app@beta
 ```
 
 That will launch `create-typescript-app` using the [`create` runner](https://create.bingo).

docs/Creation.md

@@ -1,9 +1,9 @@
 # Creating from the Terminal
 
-You can run `npx create typescript-app` in your terminal to interactively create a new repository:
+You can run `npx create typescript-app@beta` in your terminal to interactively create a new repository:
 
 ```shell
-npx create typescript-app
+npx create typescript-app@beta
 ```
 
 The creation script will by default:
@@ -34,7 +34,7 @@ See [Options.md](./Options.md).
 For example, skipping the _"This package was templated with..."_ block:
 
 ```shell
-npx create typescript-app --mode create --exclude-templated-with
+npx create typescript-app@beta --mode create --exclude-templated-with
 ```
 
 See [Blocks.md](./Blocks.md) for details on the tooling pieces and which presets they're included in.

docs/Initialization.md

@@ -1,12 +1,12 @@
 # Initializing from the Template
 
-As an alternative to [creating with `npx create typescript-app`](./Creation.md), the [_Use this template_](https://github.com/JoshuaKGoldberg/create-typescript-app/generate) button on GitHub can be used to quickly create a new repository from the template.
+As an alternative to [creating with `npx create typescript-app@beta`](./Creation.md), the [_Use this template_](https://github.com/JoshuaKGoldberg/create-typescript-app/generate) button on GitHub can be used to quickly create a new repository from the template.
 You can set up the new repository locally by cloning it and installing packages:
 
 ```shell
 git clone https://github.com/YourUsername/YourRepositoryName
 cd YourRepositoryName
-npx create typescript-app
+npx create typescript-app@beta
 ```
 
 You'll then need to manually go through the following two steps to set up tooling on GitHub:
@@ -29,7 +29,7 @@ See [Options.md](./Options.md).
 For example, skipping the _"This package was templated with..."_ block:
 
 ```shell
-npx create typescript-app --exclude-templated-with
+npx create typescript-app@beta --exclude-templated-with
 ```
 
 See [Blocks.md](./Blocks.md) for details on the tooling pieces and which presets they're included in.

docs/Migration.md

@@ -1,9 +1,9 @@
 # Migrating an Existing Repository
 
-If you have an existing repository that you'd like to give the files from this repository, you can run `npx create typescript-app` in it to "migrate" its tooling to this template's.
+If you have an existing repository that you'd like to give the files from this repository, you can run `npx create typescript-app@beta` in it to "migrate" its tooling to this template's.
 
 ```shell
-npx create typescript-app
+npx create typescript-app@beta
 ```
 
 The migration script will:
@@ -46,7 +46,7 @@ See [Options.md](./Options.md).
 For example, skipping the _"This package was templated with..."_ block:
 
 ```shell
-npx create typescript-app --exclude-templated-with
+npx create typescript-app@beta --exclude-templated-with
 ```
 
 See [Blocks.md](./Blocks.md) for details on the tooling pieces and which presets they're included in.

docs/Options.md

@@ -1,7 +1,7 @@
 # Options
 
 `create-typescript-app` is built on top of [`create`](https://create.bingo).
-`npx create typescript-app` supports all the flags defined by the [`create` CLI](https://www.create.bingo/cli).
+`npx create typescript-app@beta` supports all the flags defined by the [`create` CLI](https://www.create.bingo/cli).
 It provides three Presets:
 
 1. **Minimal**: Just bare starter tooling: building, formatting, linting, and type checking.
@@ -11,7 +11,7 @@ It provides three Presets:
 For example, to create a new repository on the _everything_ preset:
 
 ```shell
-npx create typescript-app --preset everything
+npx create typescript-app@beta --preset everything
 ```
 
 `create-typescript-app` itself adds in two sections of flags:
@@ -34,7 +34,7 @@ Each will be prompted for when creating a new repository if not explicitly provi
 For example, pre-populating both required base options:
 
 ```shell
-npx create typescript-app --description "My awesome TypeScript app! 💖" --title "My TypeScript App"
+npx create typescript-app@beta --description "My awesome TypeScript app! 💖" --title "My TypeScript App"
 ```
 
 That script will run completely autonomously, no prompted inputs required. ✨
@@ -56,7 +56,7 @@ They will be inferred from the running user, and if migrating an existing reposi
 For example, customizing the npm author and funding source:
 
 ```shell
-npx create typescript-app --author my-npm-username --funding MyGitHubOrganization
+npx create typescript-app@beta --author my-npm-username --funding MyGitHubOrganization
 ```
 
 ## Block Exclusions
@@ -65,7 +65,7 @@ Per [`create` > CLI > Template Options > Block Exclusions](https://www.create.bi
 For example, initializing with all tooling except for Renovate:
 
 ```shell
-npx create typescript-app --exclude-renovate
+npx create typescript-app@beta --exclude-renovate
 ```
 
 See [Blocks.md](./Blocks.md) for the list of blocks and their corresponding presets.