Update the CLI Guides landing page

[lornajane]

The CLI docs have a landing page with guides on, but it's missing some of the migration guides and probably some other items.

Update the page to include all guides and a little preview of what they are (beware that this can't be previewed locally, but open a draft pull request to see the preview).

[Ayush9026]

/assign @Ayush9026 i will solve this.

[Ayush9026]

Hey @lornajane , mam can I add a semi-opaque Redocly logo to the WideTileCards section in the CLI guides? I think it will look visually good.

[lornajane]

Since all the guides relate to Redocly, I'm not sure why adding the logo is valuable to the users. I advise we do not make this change.

[Ayush9026]

I am not making any changes but only seeking opinions.