feat(spec): submit map-file schema to SchemaStore

[macalbert]

Summary

Submit the Envilder map-file JSON Schema to SchemaStore/schemastore so that editors (VS Code, IntelliJ, etc.) auto-detect and validate map-files without requiring a manual $schema field.

Blocked by

• fix(spec): address map-file schema review comments #218 — Finalizes the map-file v1 schema with per-provider conditional validation

Steps

1. Fork SchemaStore/schemastore
2. Add catalog entry to src/api/json/catalog.json:
   • name: Envilder Map File
   • url: https://envilder.com/schema/map-file.v1.json
   • fileMatch: ["**/param-map*.json", "**/secrets-map*.json"]
3. Open PR to upstream SchemaStore repo
4. Once accepted, editors auto-validate map-files with autocomplete

Notes

• The schema is hosted at https://envilder.com/schema/map-file.v1.json (deployed via the website)
• SchemaStore prefers externally-hosted schemas with a stable URL
• The $schema field in map-files is optional — SchemaStore catalog provides discovery without it

[macalbert]

done SchemaStore/schemastore#5655