feat: guide user to setup MCP server

[chagong]

feat: guide user to setup MCP server

https://msazure.visualstudio.com/Microsoft%20Teams%20Extensibility/_workitems/edit/33621136

[codecov]

Codecov Report

Attention: Patch coverage is 95.06173% with 4 lines in your changes missing coverage. Please review.

Project coverage is 90.02%. Comparing base (7ec35bd) to head (7d5bbec).
Report is 3 commits behind head on dev.

Files with missing lines	Patch %	Lines
packages/vscode-extension/src/utils/mcpUtils.ts	94.80%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #14230      +/-   ##
==========================================
+ Coverage   90.01%   90.02%   +0.01%     
==========================================
  Files         646      647       +1     
  Lines       38779    38860      +81     
  Branches     7788     7794       +6     
==========================================
+ Hits        34907    34984      +77     
  Misses       1755     1755              
- Partials     2117     2121       +4     

Files with missing lines	Coverage Δ
...code-extension/src/telemetry/extTelemetryEvents.ts	100.00% <100.00%> (ø)
packages/vscode-extension/src/utils/mcpUtils.ts	94.80% <94.80%> (ø)

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