feat: migrate docs from Nextra to Fumadocs (#606)

* feat: checkpoint

* feat: Migrate docs to Fumadocs

* chore: docs layout

* chore:
- remove home route
- make docs home route
- remove docs prefix

* chore: docs layout

* chore:
- reorder sidebar
- fix home page redirect

* chore: rename package to avoid error during pnpm clean

* chore: remove private and sideEffects properties from package.json

* chore: requested fixes

* feat: update fumadocs layout

* feat: hide theme switch on sidebar

* add /docs

* feat: enhance documentation and layout with new guides and updates

- Added multiple how-to guides for creating courses, exercises, and managing organization settings.
- Updated existing documentation for clarity and consistency, including renaming sections for better navigation.
- Introduced new assets such as logos and favicon for improved branding.
- Modified layout components to enhance user experience and visual appeal.
- Updated package dependencies to include lucide-react for icon usage.

* chore: update pnpm-lock.yaml with dependency version changes

* add favicon

* fix: update links in documentation for consistency

- Corrected the links in the create-exercise and signup guides to ensure they point to the correct paths, enhancing clarity and navigation for users.

* delete docs

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/docs/package.json

@@ -1,35 +0,0 @@
-{
-  "name": "@cio/docs",
-  "version": "0.0.1",
-  "description": "ClassroomIO Documentation",
-  "scripts": {
-    "dev": "next dev",
-    "build": "next build",
-    "start": "next start"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/classroomio/classroomio.git"
-  },
-  "author": "Shu Ding <g@shud.in>",
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/classroomio/classroomio/issues"
-  },
-  "homepage": "https://github.com/classroomio/classroomio#readme",
-  "dependencies": {
-    "million": "^3.0.3",
-    "next": "^13.0.6",
-    "nextra": "2.13.2",
-    "nextra-theme-docs": "2.13.2",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0"
-  },
-  "devDependencies": {
-    "@types/node": "18.11.10",
-    "autoprefixer": "^10.4.16",
-    "postcss": "^8.4.32",
-    "tailwindcss": "^3.3.6",
-    "typescript": "^4.9.3"
-  }
-}