feat: add configuration commands for telemetry and network settings

[fathiaoyinloye]

closes #264

Summary of Changes

🎯 Core Features Implemented

1. Config Command - New starforge config command with three operations:

• starforge config show - Display all settings
• starforge config get <key> - Get specific setting
• starforge config set <key> <value> - Modify settings

2. Privacy Control - Three ways to disable telemetry:

# Permanently disable via config
starforge config set telemetry false

# Temporary: environment variable (for CI/CD)
STARFORGE_TELEMETRY=0 starforge deploy --wasm contract.wasm

# View current setting
starforge config show

3. Documentation - Created TELEMETRY_PRIVACY.md with:

• ✅ Exact data collected (command, timestamp, duration, anonymous ID only)
• ✅ Data NOT collected (wallet addresses, secret keys, personal info)
• ✅ Three opt-out methods with examples
• ✅ Privacy-first design principles
• ✅ Future remote telemetry roadmap (opt-in only)

📝 Files Modified

File	Changes
config.rs	New module with get/set/show operations
main.rs	Added Config command to CLI
telemetry.rs	Added STARFORGE_TELEMETRY env var support
config.rs	Added get_config_path() helper
README.md	Added "Configuration commands" and "Telemetry & Privacy" sections
TELEMETRY_PRIVACY.md	New comprehensive privacy documentation

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