feat: expand task suite to 22 challenges and update reward signal mechanics

feat: implement ReAct agent architecture with robust JSON parsing and expanded task suite

Restructure to root server/app.py to satisfy validator

openapi

server changes

port and server change

small fix

changed app starting

fixed port

fix: hf port + root route

docker cahnges

eas inferenece and added hard, mdeium task

inital commit phase 1