feat(xtask): consolidate CI workflows onto xtask helpers (#542)

- split the xtask crate into structured modules for
  - bindings
  - ci
  - dev
  - util
  - no-std
- Adding commands for
  - ci-release/ci-debug
  - MUSL/no-std
  - per- binding language smoke tests
  - developer tasks (fmt, clippy, pre-commit, pre-push)
- refresh Cargo manifests/locks, binding readmes, and shared FFI helpers so every binding reuses the same preparation steps
- refactor GitHub Actions (release/debug, extensions, CodeQL, clippy, bindings) to call the new xtask commands
- Use rust-cache in ci workflows (microsoft qdk also does this)
- extend README with a contributor workflow section describing how xtask mirrors CI expectations
- update pre-commit and pre-push hooks to use the xtask dev commands

WORKAROUND:
When dotnet is run from an xtask, codeql tracer intercepts it an routes to a nonexistent binary.
Therefore in codeql workflow, xtask is not used for c# and instead dotnet is directly invoked.
Tracked by #545

closes #475

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

.github/workflows/rust-clippy.yml

@@ -34,20 +34,19 @@ jobs:
 
       - name: Setup Rust toolchain
         uses: ./.github/actions/toolchains/rust
+      - name: Cache cargo
+        uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+        with:
+          shared-key: ${{ runner.os }}-regorus
 
       - name: Install required cargo
         run: cargo install clippy-sarif sarif-fmt
 
       - name: Fetch
-        run: cargo fetch
+        run: cargo fetch --locked
 
       - name: Run rust-clippy
-        run:
-          cargo clippy
-          --all-features
-          --frozen
-          --message-format=json | clippy-sarif | tee rust-clippy-results.sarif | sarif-fmt
-
+        run: cargo xtask clippy --sarif rust-clippy-results.sarif
         continue-on-error: true
 
       - name: Upload analysis results to GitHub