feat: enable multiselect for local MCP when creating DA

[rodamore]

Problem

Our current solution only supports adding a single local MCP server during DA creation, even if we discovered many options.

Solution

Enable multiselect when creating a DA with local MCP action to make it easier for devs to include more than one ODR server.

[codecov]

Codecov Report

❌ Patch coverage is 69.56522% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.43%. Comparing base (845b0d2) to head (e1df711).
⚠️ Report is 5 commits behind head on dev.

Files with missing lines	Patch %	Lines
.../component/generator/declarativeAgent/generator.ts	69.56%	3 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #15027      +/-   ##
==========================================
- Coverage   89.44%   89.43%   -0.02%     
==========================================
  Files         605      605              
  Lines       37197    37208      +11     
  Branches     7633     7462     -171     
==========================================
+ Hits        33272    33276       +4     
- Misses       1837     1840       +3     
- Partials     2088     2092       +4     

Files with missing lines	Coverage Δ
packages/fx-core/src/component/generator/utils.ts	97.22% <ø> (ø)
packages/fx-core/src/question/questionNames.ts	100.00% <ø> (ø)
.../src/question/scaffold/vsc/teamsProjectTypeNode.ts	86.51% <ø> (-1.24%)	⬇️
.../component/generator/declarativeAgent/generator.ts	88.09% <69.56%> (-6.99%)	⬇️

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