ci: split workflows and improve CI efficiency (#75)

* feat: add parallel PR check workflow

* fix: remove branch restriction for PR check workflow

* fix: suppress clippy warnings for needless lifetimes in CI workflows

* refactor: consolidate Clippy checks and streamline test workflows

* feat: add documentation workflow and remove legacy Rust CI workflow

* feat: trigger PR check workflow on push to main branch

* fix: update test command to use CI profile in PR check workflow

* fix: enhance test command with partitioning and retries for improved performance

* fix: remove partitioning from test command in PR check workflow

* fix: update test job to use matrix strategy for multiple crates

* fix: enhance test command with additional options for better output and error handling

* fix: remove silent mode from test command for clearer output

* fix: add check for existing tests before running in PR check workflow

* fix: add missing fi statement to close if condition in PR check workflow

* fix: improve test command logic to handle no tests found scenario

.github/workflows/docs.yml

@@ -0,0 +1,57 @@
+name: Documentation
+
+on:
+  push:
+    branches: [ main ]
+
+permissions:
+  contents: write
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cache mdbook installation
+      uses: actions/cache@v2
+      with:
+        path: ~/.cargo/bin/mdbook
+        key: ${{ runner.os }}-mdbook
+
+    - name: Cache mdbook-mermaid installation
+      uses: actions/cache@v2
+      with:
+        path: ~/.cargo/bin/mdbook
+        key: ${{ runner.os }}-mdbook-mermaid
+
+    - name: Install mdBook if not installed already
+      run: |
+        if [ ! -f ~/.cargo/bin/mdbook ]; then
+          cargo install mdbook
+        fi
+
+    - name: Install mdBook-mermaid if not installed already
+      run: |
+        if [ ! -f ~/.cargo/bin/mdbook-mermaid ]; then
+          cargo install mdbook-mermaid
+        fi
+
+    - name: Cache mdBook build
+      id: mdbook-build-cache
+      uses: actions/cache@v3
+      with:
+        path: ./docs/book/
+        key: ${{ runner.os }}-mdbook-${{ hashFiles('./docs/**') }}
+        restore-keys: |
+          ${{ runner.os }}-mdbook-
+
+    - name: Build the book
+      if: steps.mdbook-build-cache.outputs.cache-hit != 'true'
+      run: mdbook build ./docs/
+
+    - name: Deploy book to GitHub Pages
+      uses: peaceiris/actions-gh-pages@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./docs/book/