feat(mcp): enhance FastMCP server integration with multi-transport support and update CLI options

[httpdss]

Issue

Description

Checklist

• I have read the contributing guidelines.
• My code follows the code style of this project.
• I have performed a self-review of my own code.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have updated the documentation accordingly.

Screenshots (if applicable)

Additional Comments

[codecov]

Codecov Report

❌ Patch coverage is 55.60166% with 107 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@e3973e2). Learn more about missing BASE report.
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
struct_module/mcp_server.py	65.05%	54 Missing and 11 partials ⚠️
struct_module/commands/mcp.py	27.08%	35 Missing ⚠️
struct_module/main.py	0.00%	7 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #112   +/-   ##
=======================================
  Coverage        ?   68.06%           
=======================================
  Files           ?       20           
  Lines           ?     1522           
  Branches        ?      269           
=======================================
  Hits            ?     1036           
  Misses          ?      411           
  Partials        ?       75           

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