Add deck file openapi2mcp

[mheap]

Add support for openapi2mcp for configuring the MCP plugin

[codecov-commenter]

Codecov Report

❌ Patch coverage is 67.59388% with 233 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.30%. Comparing base (cdc8f8f) to head (7114358).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
openapi2mcp/openapi2mcp.go	67.59%	154 Missing and 79 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #286      +/-   ##
==========================================
- Coverage   69.75%   69.30%   -0.46%     
==========================================
  Files          24       25       +1     
  Lines        2738     3457     +719     
==========================================
+ Hits         1910     2396     +486     
- Misses        652      806     +154     
- Partials      176      255      +79     

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