refactor: allow to pass component name without DS prefix

[poltorak]

🎯 Allow Design System Component Names Without "Ds" Prefix

Summary

This PR enhances the flexibility of Design System component validation by allowing component names to be specified with or without the "Ds" prefix.

Changes

• Component Validation: Updated regex pattern to accept both "Button" and "DsButton" formats
• Error Messages: Improved error messages to reflect the new flexible naming convention
• Documentation: Updated JSDoc comments with examples showing both naming formats

Files Changed

• packages/angular-mcp-server/src/lib/tools/ds/shared/utils/component-validation.ts
• packages/angular-mcp-server/src/lib/tools/ds/shared/utils/regex-helpers.ts

Before/After Examples

Before: Only "DsButton" was accepted
After: Both "DsButton" and "Button" are accepted

Impact

• ✅ Backward compatible - existing "Ds" prefixed names continue to work
• ✅ More user-friendly - developers can use shorter component names
• ✅ Improved developer experience with clearer error messages