Add estampo.toml schema (self-hosted) (#5586)

estampo is a build system for reproducible 3D prints. Users write an
estampo.toml config file to define parts, slicer settings, and pipeline
stages.

Schema is hosted at:
https://raw.githubusercontent.com/estampo/estampo/main/docs/estampo.schema.json

Project: https://github.com/estampo/estampo

Co-authored-by: estampo <estampo@users.noreply.github.com>

Author: pzfreo

src/api/json/catalog.json

@@ -2649,6 +2649,12 @@
       "description": "Esquio configuration files",
       "url": "https://www.schemastore.org/esquio.json"
     },
+    {
+      "name": "estampo.toml",
+      "description": "Configuration for estampo, the build system for reproducible 3D prints",
+      "fileMatch": ["estampo.toml", "estampo.*.toml"],
+      "url": "https://raw.githubusercontent.com/estampo/estampo/main/docs/estampo.schema.json"
+    },
     {
       "name": "epr-manifest.json",
       "description": "Entry Point Regulation manifest file",