Remove build and maintain (#6660)

* rm build

* fix home card link

* rm maintain

- added redirects
- minor tweaks

* add guides section

* edits sidebar

* edit home

-  add kusama logo

Author: filippoweb3

.github/workflows/status-badges.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Check and update badges
         uses: w3f/[email protected]
         with:
-          path: 'docs/build/build-open-source.md'
+          path: 'docs/general/build-open-source.md'
           token: ${{ secrets.GITHUB_TOKEN }}
           find-all-links: true
           pull-request: true