Allow selection of multiple browser viewport sizes and adjusting screenshot quality

[mrubens]

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Important

This pull request adds support for selecting multiple browser viewport sizes and adjusting screenshot quality, updating settings, state management, and documentation accordingly.

• Behavior:
  • Allows selection of multiple browser viewport sizes and adjusting screenshot quality in ClineProvider and BrowserSession.
  • Default viewport size set to 900x600 and screenshot quality to 75 if not specified.
• Settings:
  • Adds browserViewportSize and screenshotQuality settings in SettingsView.tsx.
  • Updates SettingsView.test.tsx to test new settings.
• State Management:
  • Updates ExtensionStateContext.tsx to manage new settings.
  • Modifies ClineProvider.ts to handle new settings in global state.
• Misc:
  • Updates README.md to reflect new options.
  • Adjusts jest.config.js to ignore .vscode-test in module paths.

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