Update README.md

Improve conversation memory, screen routing, dispatch handling, and audio collision prevention

Revert vite config to default port 8340

Add three-tier conversation memory with rolling session summary

Add JARVIS self-awareness of last response to prevent repetition

Prevent audio collision between dispatch results and conversation

Check for recent dispatch results before re-dispatching to a project

Fix screen capture action routing to prevent misrouting to PROMPT_PROJECT

Fix async calls and improve conversation memory retention

Add contributing guidelines

Add Marvel/Disney disclaimer to README

Initial release: JARVIS Voice AI Assistant