fix: Add dot prefix to event handlers in application templates

[Yarloy037]

Description

This PR fixes the event handler syntax in both TypeScript and JavaScript application templates to comply with UI5 best practices and UI5 Linter requirements.

Problem

Generated applications contain event handlers without the required dot prefix:

• press="sayHello" ❌

This triggers UI5 Linter warning: no-ambiguous-event-handler

Solution

Added dot prefix to all controller method event handlers:

• press=".sayHello" ✅

Changes

• Updated resources/template-ts/webapp/view/Main.view.xml
• Updated resources/template-js/webapp/view/Main.view.xml

References

• UI5 Documentation: Handling Events in XML Views
• UI5 Linter Rule: no-ambiguous-event-handler

**Thank you for your contribution!** 🙌

To get it merged faster, kindly review the checklist below:

## Pull Request Checklist
- [ ] Reviewed the [Contributing Guidelines](https://github.com/UI5/mcp-server/blob/main/CONTRIBUTING.md#-contributing-code)
    + Especially the [How to Contribute](https://github.com/UI5/mcp-server/blob/main/CONTRIBUTING.md#how-to-contribute) section 
- [ ] [No merge commits](https://github.com/UI5/mcp-server/blob/main/docs/Guidelines.md#no-merge-commits)
- [ ] [Correct commit message style](https://github.com/UI5/mcp-server/blob/main/docs/Guidelines.md#commit-message-style)

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