docs: setup docusaurus for documentation (#848)

* docs: setup docusaurus for documentation

* docs: setup tailwind content for docusaurus

* chore: ensure tailwindcss is installed so pages deploy works

* docs: add cname to point to docs

* ci: override format checking for pnpm-lock in gen-docs folder

* docs(gen-docs): readme for docusaurus

* chore(gen-docs): remove unnecessary image files

* docs: remove installation instructions (moved to docs)

* ci: rename docusaurus workflows to a more explicit name

* style(gen-docs): custom color for links

* docs: add more doc pages

* style: gradient menu link bg, proper jellyseerr font & footer bg color

* docs: fix proper link to relative pages

* style: tab-items also now uses the proper jellyseerr colors

* style: use prismTheme shadesOfPurple for codeblock/syntax highlighting

* docs: fix broken links

* docs: fix broken links

* docs: fix broken anchors

* chore(gen-docs): local search bar

* style(gen-docs): tab colors

* docs: reverse-proxy documentation

* style(gen-docs): jellyseerr-like cards

* docs: rename baremetal to build from source

* docs: nixpkg version check component

* docs: conditionally render override package derivation block and admonitions

* docs: users section of the documentation

.github/workflows/test-docs-deploy.yml

@@ -0,0 +1,51 @@
+name: Test Docs deployment
+
+on:
+  pull_request:
+    branches:
+      - develop
+    path:
+      - 'docs/**'
+      - 'gen-docs/**'
+
+jobs:
+  test-deploy:
+    name: Test deployment
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Pnpm Setup
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
+      - name: Get pnpm store directory
+        shell: sh
+        run: |
+          echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
+
+      - name: Setup pnpm cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - name: Install dependencies
+        run: |
+          cd gen-docs 
+          pnpm install --frozen-lockfile
+
+      - name: Build website
+        run: |
+          cd gen-docs
+          pnpm build