feat: add MCP configuration review action

[dungdong-aws]

Summary

Adds a View full configuration action to the workspace MCP approval dialog.

Selecting it opens the workspace .amazonq/mcp.json file with editor focus, then displays the approval dialog again. The server is not started and no approval is recorded until the user explicitly chooses Allow for this server.

Behavior

Workspace MCP approval dialog
  → View full configuration
  → Open .amazonq/mcp.json
  → Re-display approval dialog
  → Allow or Deny

This lets users inspect the complete source configuration before making their approval decision while preserving the existing Allow/Deny behavior.

Tests

Adds coverage that verifies:

• the review action opens the expected workspace configuration URI with focus;
• the dialog is displayed again after review;
• a later Deny does not record approval.

Validation

• Prettier check passed.
• TypeScript no-emit compile passed for server/aws-lsp-codewhisperer.
• Normal pre-commit and pre-push hooks passed.
• The focused unit suite was not run locally; CI will run the repository checks.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 88.67925% with 6 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...anguage-server/agenticChat/tools/mcp/mcpManager.ts	88.67%	6 Missing ⚠️

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