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>

bindings/csharp/Regorus.Tests/Regorus.Tests.csproj

@@ -12,11 +12,6 @@
   <PropertyGroup>
     <!-- If the environment variable is set (such as in a Github Action run), append the suffix to the version number -->
     <RegorusPackageVersionSuffix Condition="'$(VersionSuffix)' != ''">-$(VersionSuffix)</RegorusPackageVersionSuffix>
-    <UseLocalRegorus Condition="'$(UseLocalRegorus)' == ''">true</UseLocalRegorus>
-  </PropertyGroup>
-
-  <PropertyGroup Condition="'$(UseLocalRegorus)' == 'true'">
-    <DefineConstants>$(DefineConstants);REGORUS_FFI_TEST_HOOKS</DefineConstants>
   </PropertyGroup>
 
   <ItemGroup>
@@ -27,13 +22,7 @@
     <PackageReference Include="MSTest" Version="3.8.2" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(UseLocalRegorus)' == 'true'">
-    <ProjectReference Include="../Regorus/Regorus.csproj">
-      <AdditionalProperties>EnableRegorusTestHooks=true</AdditionalProperties>
-    </ProjectReference>
-  </ItemGroup>
-
-  <ItemGroup Condition="'$(UseLocalRegorus)' != 'true'">
+  <ItemGroup>
     <PackageReference Include="Regorus" Version="0.8.0$(RegorusPackageVersionSuffix)" />
   </ItemGroup>
 </Project>