feat(UI-1889): auto-save autokitteh project files

[RonenMars]

Description

• Auto-save functionality - Automatically saves changes every 3 seconds after user stops typing (debounced)
• Visual save indicators - Shows "Saving..." and "Saved" states with toast notifications during save operations
• Error handling - Displays error toasts if auto-save fails, allowing users to retry manually
• Debouncing mechanism - Uses 3-second delay to avoid excessive save operations while typing
• Fast and clear feedback to the user - Provides clear toast notifications to users about save status through non-intrusive toast messages

Screenshot

Linear Ticket

https://linear.app/autokitteh/issue/UI-1889/vscode-autosave-files-on-edit-in-project-dir

What type of PR is this? (check all applicable)

• 💡 (feat) - A New Feature (non-breaking change which adds functionality)
• 🔄 (refactor) - Code Refactoring - A code change that neither fixes a bug nor adds a feature
• 🐞 (fix) - Bug Fix (non-breaking change which fixes an issue)
• 🏎 (perf) - Optimization
• 📄 (docs) - Documentation - Documentation only changes
• 📄 (test) - Tests - Adding missing tests or correcting existing tests
• 🎨 (style) - Styles - Changes that do not affect the meaning of the code (white spaces, formatting, missing semi-colons, etc)
• ⚙️ (ci) - Continuous Integrations - Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
• ☑️ (chore) - Chores - Other changes that don't modify src or test files
• ↩️ (revert) - Reverts - Reverts a previous commit(s).

Code Standards

• Notify only when user attention is needed, otherwise log to console.
  • Notifications: short description with context identifiers (e.g. id of the manipulated entity).
  • Logs: full description with full context identifiers (e.g. deploymentId and the relevant projectId).
• If you're not sure what is the proper behavior, consult with the product team.
• Reduce the use of else by employing early returns to make code more readable and less nested.
• MVC Separation: Ensure separation of concerns; views should only be manipulated by controllers (also the computing - sorting, fitlering, etc.), not by services, to maintain a clean MVC architecture.
• Before implementing custom logic, check if existing functions or utilities (like lodash) offer a simpler solution.
• Avoid using !important in CSS where possible.
• Use memoization for class calculations.
• Place constant strings in your code using I18n.