Initial commit: Pezkuwi SDK UI

Comprehensive web interface for interacting with Pezkuwi blockchain.

Features:
- Blockchain explorer
- Wallet management
- Staking interface
- Governance participation
- Developer tools

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

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+build/
+build-*/
+coverage/
+node_modules/
+tmp/
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.npmrc
+.yarn/*
+!.yarn/releases
+!.yarn/plugins
+.pnp.*
+cc-test-reporter
+package-lock.json
+npm-debug.log*
+tsconfig.*buildinfo
+yarn-debug.log*
+yarn-error.log*
+.idea/
+.log
+env-config.js
+NOTES.md