feat: add Report/About/Changelog buttons to Support ribbon group

- REPORT opens GitHub new-issue page
- ABOUT opens a dialog window with version, OS and arch info + Copy Info button
- CHANGELOG opens GitHub releases page
- Fix Windows build: add windows-sys as target-specific dependency for PRINT command

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Cargo.lock

@@ -18,6 +18,7 @@ dependencies = [
  "truck-meshalgo",
  "truck-modeling",
  "truck-polymesh",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]