Qt AI Assistant version 0.9.5 (#30)

## Qt AI Assistant v0.9.5 Release Notes
# Key Changes

- Added project context support for LLMs: Improves code understanding,
syntax fixes, and integration via other project files. Manage via token
limits, open files, or .aiignore
- Integrated Gemini 2.5 Pro: 58% QML100 score; experimental for code
completion due to formatting issues
- Upgraded DeepSeek to v3.1: 62% QML100, 87% QML100FIM; 128k tokens;
notes on imports/UI preferences
- Enhancements: Reasoning mode for Claude (selective commands); Sonnet 4
to 1M tokens; stop button; prompt caching.
Deprecated: Claude Sonnet 3.5

# Install
Via Qt Creator Extensions in 17.0.1+.

## Checklist

- [x] I have run `npm run all` to validate my changes
- [x] I have made sure my commits are
[signed](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits)
- [ ] I have added an entry for new Extensions in
[CODEOWNERS](/CODEOWNERS)

Author: lupax