Support XAML files

Area

gitnexus (CLI / core / indexing / MCP server)

Problem or opportunity

Currently XAML files is not supported

Proposed solution

Add XAML file parsing as files and tokens to be able to trace changes better

Alternatives considered

No response

Acceptance criteria

• Can index repo with xaml files in different queries and tools

Constraints

No response

Contribution

• I am willing to open a PR for this (may need design discussion first).