Add hover tooltips for CMake policy identifiers (#4754)

* Initial plan

* Add CMake policy hover tooltips with version, description, and docs link

Co-authored-by: snehara99 <[email protected]>

* Improve policy descriptions to include complete first paragraph

Co-authored-by: snehara99 <[email protected]>

* Update policies.json with CMake 4.2.3 policies (CMP0181–CMP0204)

Co-authored-by: snehara99 <[email protected]>

* updated policies from process.py

* updated policy formatting

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: snehara99 <[email protected]>
Co-authored-by: Sneha Ramachandran <[email protected]>

Author: Copilot

CHANGELOG.md

@@ -19,6 +19,7 @@ Improvements:
 - Add MSVC linker error problem matching to the Problems pane. [#4675](https://github.com/microsoft/vscode-cmake-tools/pull/4675) [@bradphelan](https://github.com/bradphelan)
 - Use environment variables from `cmake.environment` and `cmake.configureEnvironment` when expanding `$penv{}` macros in CMake Presets `include` paths. [#3578](https://github.com/microsoft/vscode-cmake-tools/issues/3578)
 - Allow preset modification commands to target CMakeUserPresets.json. The target file is determined by the focused editor, or by prompting the user when both files exist. [#4564](https://github.com/microsoft/vscode-cmake-tools/issues/4564)
+- Display info tooltip when hovering over CMake policy identifiers (e.g., `CMP0177`), showing the CMake version that introduced the policy, a short description, and a link to the official documentation. [#4544](https://github.com/microsoft/vscode-cmake-tools/issues/4544)
 
 Bug Fixes:
 - Reduce overly verbose logging when CMake configure or build fails. The Output panel no longer floods with duplicated output, and the channel is only revealed on error rather than unconditionally. [#4749](https://github.com/microsoft/vscode-cmake-tools/issues/4749)