Codebase indexing scope and project relationships

• The shared codebase index should initially cover only the Agro projects: coleta-web, api.coleta, api.maps, coleta-app, and gateway.
• Related J17 applications may be added to the same index when their source is available at D:\projecto\j17.
• Projects can be linked in the index when relationships between repositories or services are useful for code navigation; linking is not required for independent projects.

This keeps the initial index focused while allowing cross-project context where service dependencies or shared functionality warrant it.