feat: implemented notification system and AI helper features

[RehanSaad1]

I have improved the ui/ux and responsiveness.
worked on:
CONVERT THE FRONTEND TO TYPESCRIPT (FIRST TASK)
ADD DOCS (ACCORDING TO THE COMMUNITY STANDARDS OF GITHUB)
IMPROVE THE UI/UX OF THE WEBSITE
USE NEXT.JS
REVIEW-BEFORE-PUSH FLOW
PREVIEW THE AI-GENERATED DIFF AND REQUEST CHANGES BEFORE OPENING THE PR
PROMPT ASSISTANT
IN-APP AI HELPER THAT IMPROVES USER INSTRUCTIONS BEFORE THEY SUBMIT A JOB
IN-APP DIFF VIEWER
SYNTAX-HIGHLIGHTED SPLIT DIFF ON JOBDETAILPAGE — NO NEED TO OPEN GITHUB
REAL-TIME NOTIFICATIONS
TOAST ALERTS AND BELL ICON DROPDOWN WHEN JOBS COMPLETE, FAIL, OR NEED REVIEW
KEYBOARD SHORTCUTS
POWER-USER HOTKEYS (N=NEW JOB, D=DASHBOARD, ?=HELP) WITH AN IN-APP CHEATSHEET

[vercel]

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