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/publish-python.yml

@@ -26,7 +26,7 @@ jobs:
 
       - name: Build Python extension
         run: |
-          cargo fetch
+          cargo fetch --locked
           cargo clippy --all-targets --no-deps -- -Dwarnings
           cargo build --release --target ${{ matrix.target }} --frozen
         working-directory: bindings/python
@@ -59,7 +59,7 @@ jobs:
 
       - name: Build Python extension
         run: |
-          cargo fetch
+          cargo fetch --locked
           cargo clippy --all-targets --no-deps -- -Dwarnings
           cargo build --release --target ${{ matrix.host.target }} --frozen
         working-directory: bindings/python
@@ -90,7 +90,7 @@ jobs:
 
       - name: Build Python extension
         run: |
-          cargo fetch
+          cargo fetch --locked
           cargo clippy --all-targets --no-deps -- -Dwarnings
           cargo build --release --target ${{ matrix.host.target }} --frozen
         working-directory: bindings/python