feat: MCP server with instructions + one-command install + skill file rewrite

feat: one-command install script for agent setup

fix: rewrite skill file and agent prompts to not trigger AI safety filters

docs: add roadmap with x402 integration, multi-chain, gasless

fix: GitHub URL → spendcontrol/agentvault

docs: README rewritten with hackathon track alignment

feat: favicon — SpendControl logo in browser tab

chore: SSL enabled, all URLs now https://spendcontrol.xyz

chore: nginx configured, remove :3000 from all URLs

chore: replace all IPs with spendcontrol.xyz domain

fix: GitHub URLs, SDK imports, README rewrite

feat: full documentation site at /docs/

fix: rewrite developer section with correct API + Quick Start tab

fix: badge says Live on Ethereum Mainnet

fix: token presets per network (USDC address differs mainnet vs testnet)