Add ERC20 token and Starknet agent projects

[Chibey-max]

Summary

This PR adds three bootcamp project folders:

• erc_token/: Cairo ERC20-style restricted token contract with transfer limits, owner-only admin controls, allowance management, deployment script, and Starknet Foundry tests.
• starknet-agentic/: Starknet agentic tooling project used as the MCP/tooling layer for agent workflows.
• transfer-agent/: TypeScript autonomous transfer agent that uses starknet-agentic MCP tools to fetch balances, validate transfer rules, optionally transfer STRK, run a second action, and log execution receipts.

ERC20 Token

• Implements RestrictedToken in Cairo.
• Includes ERC20-style functions: metadata, balances, transfer, approval, allowance, and transfer_from.
• Adds restricted functionality:
  • owner-only transfer limit updates
  • owner-only admin burn
  • user allowance revoke
  • transfer limit enforcement
• Includes tests for constructor setup, transfers, allowances, owner-only controls, revoke, transfer limits, and admin burn.
• Adds Sepolia deployment helper script.

Transfer Agent

• Fetches Starknet wallet balance.
• Validates balance > MIN_BALANCE_TO_TRANSFER.
• Runs transfer in dry-run or execute mode.
• Performs a second MCP action with get_balances or call_contract.
• Logs execution receipts as JSONL.
• Alerts when balance is below ALERT_BALANCE_THRESHOLD.
• Includes .env.example, README, TypeScript source, and workflow docs.

Safety

Excluded local/private/generated files:

• transfer-agent/.env
• transfer-agent/node_modules/
• transfer-agent/transfer-agent-log.jsonl
• generated Cairo build/cache files