feat(tron): add TRC20 approval resource sponsoring extension

[boboliu-1010]

Description

Adds the TRC20 Approval Resource Sponsoring extension on top of the released v1.1.0 baseline, targeting the v1.2.0 release of the TypeScript Extensions and TRON packages.

This PR:

• carries forward the x402 v2 specification migration from docs: migrate and update x402 v2 specifications #81;
• defines the TRC20 approval resource sponsoring protocol and wire format;
• implements client, server, and facilitator extension hooks;
• validates sponsored approval transactions before broadcast;
• delegates and revokes TRON Energy around settlement;
• adds unit, integration, and repeatable Nile end-to-end examples;
• adds changesets for minor releases of @bankofai/x402-extensions and @bankofai/x402-tron.

Tests

• Core: 649 tests passed
• Extensions: 531 tests passed
• TRON: 185 tests passed
• Core, Extensions, and TRON CJS/ESM/DTS builds passed
• Extensions and TRON lint and formatting checks passed
• Nile fresh-wallet end-to-end flow passed: activation, funding, verification, resource delegation, approval settlement, payment, and delegation cleanup
• Nile settlement transaction: cc54ec9c00bdfb0d7a8ebb7cbabdd833a06108bd84c3edc86e018bfa2bd93a74

Checklist

• I have formatted and linted my code
• All new and existing tests pass
• My commits are signed (required for merge)