chore: replatform docs site to Astro + Starlight (#7012)

* chore: replatform docs site to Astro + Starlight

I tried to resist the temptation to fix other tech debt here (untyped JS, etc.).

* feat: add better OG image

* fix: replace dark logo with well-sized image

* feat: add more social links

* feat: link to forums cli tag

* feat: change Changelog link to Release notes

Author: serhalp

.github/workflows/docsearch.yml

@@ -22,9 +22,8 @@ vendor
 /.netlify
 
 # site
-test-site
 site/dist
-site-cra
+site/.astro/
 site/src/**/*.md
 
 # tests

.gitignore

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI api command
+sidebar:
+  label: api
 ---
 
 # `api`

docs/commands/api.md

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI blobs command
+sidebar:
+  label: blobs
 description: Manage objects in Netlify Blobs
 ---
 

docs/commands/blobs.md

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI build command
+sidebar:
+  label: build
 ---
 
 # `build`

docs/commands/build.md

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI completion command
+sidebar:
+  label: completion
 description: Shell completion script for netlify CLI
 ---
 

docs/commands/completion.md

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI deploy command
+sidebar:
+  label: deploy
 ---
 
 # `deploy`

docs/commands/deploy.md

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI dev command
+sidebar:
+  label: dev
 description: Run netlify dev locally
 ---
 

docs/commands/dev.md

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI env command
+sidebar:
+  label: env
 description: Control environment variables for the current site
 ---
 

docs/commands/env.md

@@ -1,5 +1,7 @@
 ---
 title: Netlify CLI functions command
+sidebar:
+  label: functions
 description: Run netlify dev locally
 ---