feat: add script to update GraphQL schema from DeepSource API (#177)

* feat: add script to update graphql schema from deepsource api

- Add reusable script to fetch and update GraphQL schema via introspection
- Add 'schema:update' npm script for easy schema updates
- Install graphql package for schema introspection utilities
- Update schema to latest version from DeepSource API (53KB)

The script uses GraphQL introspection to fetch the complete schema
from https://api.deepsource.io/graphql/ and saves it in SDL format.
This ensures the schema stays up-to-date with DeepSource API changes.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

* Apply suggestion from @Copilot

Co-authored-by: Copilot <[email protected]>

* chore: add changeset for schema update feature

---------

Co-authored-by: Claude <[email protected]>
Co-authored-by: Copilot <[email protected]>

Author: 3 people

.changeset/six-radios-throw.md

@@ -0,0 +1,10 @@
+---
+'deepsource-mcp-server': patch
+---
+
+feat: add script to update GraphQL schema from DeepSource API
+
+- Add reusable script to fetch and update GraphQL schema via introspection
+- Add 'schema:update' npm script for easy schema updates
+- Install graphql package for schema introspection utilities
+- Update schema to latest version from DeepSource API