Add tests, fixtures, and CI/CD workflow

tests/dataforge_fixtures/valid_schema.json

@@ -0,0 +1,46 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "properties": {
+    "name": {
+      "type": "string"
+    },
+    "version": {
+      "type": "string",
+      "pattern": "^\\d+\\.\\d+\\.\\d+$"
+    },
+    "description": {
+      "type": "string"
+    }
+  },
+  "author": {
+    "type": "string"
+  },
+  "settings": {
+    "type": "object",
+    "properties": {
+      "debug": {
+        "type": "boolean"
+      },
+      "timeout": {
+        "type": "integer",
+        "minimum": 0
+      },
+      "retries": {
+        "type": "integer",
+        "minimum": 0,
+        "maximum": 10
+      }
+    },
+    "required": ["debug", "timeout"]
+  },
+  "tags": {
+    "type": "array",
+    "items": {
+      "type": "string"
+    },
+    "minItems": 1
+  }
+  },
+  "required": ["name", "version"]
+}