Update OrgX skills for MCP v2 tools

[hopeatina]

Summary

• Rewrite canonical OrgX skills, instructions, examples, and required tool lists to teach MCP v2 tool names.
• Update skill drift checking so deprecated v1 public names fail unless explicitly allowlisted for compatibility.
• Establish orgx_bootstrap/search/inspect/write/act/attach/receipt language as the canonical workflow.

Verification

• python3 scripts/check_skill_tool_drift.py
• git diff --check