Add simple release docs

docs/release.md

@@ -0,0 +1,27 @@
+# CLI
+
+The release process of the air cli has some manual steps. When you want to cut a release:
+
+- Create a release branch
+
+    - In `crates/air/Cargo.toml`, bump the version.
+
+    - Run `cargo check` to sync `Cargo.lock`.
+
+    - Do a PR and merge the release branch.
+
+- Manually run the [release workflow](https://github.com/posit-dev/air/actions/workflows/release.yml)
+
+    - It runs on `workflow_dispatch`, and you must provide the `Release Tag` version to create. Always provide the same version that you used in `Cargo.toml`. Do not prefix the version with a `v`.
+
+    - The release workflow will:
+
+        - Build the binaries and installer scripts.
+
+        - Create and push a git tag for the version.
+
+        - Create a GitHub Release attached to that git tag.
+
+        - Attach the binaries and scripts to that GitHub Release as artifacts.
+
+There is no need to bump to an intermediate "dev version" after a release.