feat: expand Amplify Shader Editor toolset from 9 to 23 tools (v2.14.0)

Add 14 new MCP tool definitions and bridge wrappers for full Amplify
graph manipulation: add/remove/connect/disconnect/duplicate nodes, set
properties, move, save/close, templates, master node info, focus view.
268 total tools across 24 categories.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>