Update landing page to better direct users how to use IPFS

[ElPaisano]

Problem description

The landing page https://docs.ipfs.tech/ contains the following subsections:

• https://docs.ipfs.tech/#learn
• https://docs.ipfs.tech/#develop
• https://docs.ipfs.tech/#join-the-ipfs-community

However, the page doesn't do a great job of directing the user how they can use IPFS. https://docs.ipfs.tech/#develop sort of attempts this, and directs the reader to pages like https://docs.ipfs.tech/install/ and https://docs.ipfs.tech/reference/. However, this could be done better:

Suggestion

Create a Get started section at the top of https://docs.ipfs.tech/ that resuses info from:

1. https://docs.ipfs.tech/install/
2. https://docs.ipfs.tech/reference/

Goal should be to make it clear the main ways (kubo, helia, desktop, companion, pinning service, etc.) in which users can actually do things with IPFS, and direct them quickly to the info on how to get started