Add editor

[yangw-dev]

Add Code Editor (Beta) In-browser code editor for kernel submissions as an alternative to CLI.
currently hide from leaderboard page, can access with

https://www.gpumode.com/home?tab=rankings&editor

Features

• Code Editor - Python syntax highlighting, file upload support
• Live Output - Real-time job status with 15-min polling timeout
• Resizable Layout - Draggable editor/output split (mobile touch supported)
• Quick Submit - GPU type & mode selection with one-click submit

UI Changes

• "Submit via CLI" and "Code Editor (Beta)" buttons always visible in leaderboard header

next step

• add default code implementation for leaderboard
• improve history feature

testing

introduce fake backend async work for local development using USE_MOCK_SUBMISSION=true
this mimic the backend to update db for test, benchmark and leaderboard stage, it also can mimic
failure at each stage

rendering

• the sidepanel can be expand and shirnk within the view screen
• the editor and output logs can be expand and shrink within the view screen
• in small screen and mobile mode, the description is rendered vertically align with outout and editor

big screen

mobile

[msaroufim]

Doesn't seem to be working