Qt AI Assistant version 0.9.7 (#44)

## Qt AI Assistant 0.9.7 Release
- **Qt Quick Ultralite Converter Assistant**: New tool to convert QML
code to Qt Quick Ultralite for MCU deployment, handling core graphical
features and adapting unsupported elements.

- **Claude Sonnet Upgrade**: Added support for version 4.5, enhancing
Qt6-compliant code generation.

- **DeepSeek Upgrade**: Moved from v3.1 to v3.2, maintaining coding
performance with prompt tweaks.

- **Codestral 2508 Support**: Added for natural language prompts and
code completion

- **Multiline Prompts**: Now supported via Shift-Return for complex
inputs.

- **Token Estimate Counter**: Added for Sonnet 4.5 and Gemini 2.5 Pro in
inline prompts.

## 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)
- [x] I have read and I agree with the [Qt Creator Extensions Store
Publisher
Terms](https://github.com/qt-creator/extension-registry/blob/main/documentation/publisher-terms.pdf)

Author: lupax