feat(UI-1898): datadog rum

[RonenMars]

Description

Key Components

• RUM Initialization: Integrated Datadog RUM in application bootstrap (main.tsx)
• Error Tracking: Enhanced error handling with Datadog monitoring capabilities
• Performance Monitoring: Enabled resource tracking, long tasks monitoring, and user interaction tracking
• Privacy Controls: Implemented privacy-first configuration with user input masking

🛡️ Privacy & Security

• User Input Masking: Default privacy level set to mask sensitive user inputs
• Environment-Aware: Different configurations for production vs development
• Domain Restrictions: Tracing limited to localhost and autokitteh.com domains

Linear Ticket

https://linear.app/autokitteh/issue/UI-1898/datadog-browser-session-recordings

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-space, 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).

[itayd]

why is this needed for dd?

[itayd]

why is this pr so big? isn't it just embedding dd tracking script magic somewhere?

[RonenMars]

@itayd reduced it to this: #1333