Add Rust Environment module

Adds helpers for checking if a firmare environment is ready to build
Rust.

The primary purpose of the functionality in rust_environment is to be
used in a build plugin wrapper. However, the public functions may be
used in other contexts as well.

Signed-off-by: Michael Kubacki <[email protected]>

docs/user/features/rust_environment.md

@@ -0,0 +1,59 @@
+# Rust Environment Helpers
+
+## About Rust Environment Helpers
+
+Firmware developer's machines are often not setup for Rust. As more Rust code is proliferating across the repos, this
+code can be used to provide early and direct feedback about the developer's environment so it can successfully build
+Rust code using the tools commonly used in the firmware build process.
+
+## Usage
+
+The primary purpose of the functionality in `rust_environment` is to be used in a build plugin wrapper. However, the
+public functions may be used in other contexts as well. The following functions are available:
+
+- `run()` - Checks the current environment for Rust build support.
+  - The checks can be customized with the `custom_tool_checks` and `custom_tool_filters` parameters.
+- `get_workspace_toolchain_version()` - Returns the rust toolchain version specified in the workspace toolchain file.
+- `verify_workspace_rust_toolchain_is_installed()` - RVerifies the rust toolchain used in the workspace is available.
+
+### Integration Examples
+
+This section provides examples of how to use the functions available in `edk2toolext/codeql.py`.
+
+#### `run()`
+
+Call to check the environment for Rust build support:
+
+```python
+    import edk2toolext.rust_environment as rust_env
+
+    def Run(self):
+        rust_env.run()
+```
+
+#### `get_workspace_toolchain_version()`
+
+Call to get Rust toolchain info:
+
+```python
+    import edk2toolext.rust_environment as rust_env
+
+    def GetWorkspaceToolchainVersion(self):
+        toolchain = rust_env.get_workspace_toolchain_version()
+        print(f"Workspace toolchain version: {toolchain_version.toolchain}")
+```
+
+#### `verify_workspace_rust_toolchain_is_installed()`
+
+Call to verify the workspace specified toolchain is installed:
+
+```python
+    import edk2toolext.rust_environment as rust_env
+
+    def VerifyWorkspaceRustToolchainIsInstalled(self):
+        rust_toolchain_info = verify_workspace_rust_toolchain_is_installed()
+        if rust_toolchain_info.error:
+            print(f"Error: {rust_toolchain_info.error}")
+        else:
+            print(f"Rust toolchain is installed: {rust_toolchain_info.toolchain}")
+```