Add GSP project manifest and design layout

language/gsp.manifest.schema.json

@@ -0,0 +1,62 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://gsp.local/schema/gsp.manifest.schema.json",
+  "title": "GSP Manifest",
+  "description": "Game Specification Protocol project manifest schema.",
+  "type": "object",
+  "additionalProperties": true,
+  "properties": {
+    "gspVersion": {
+      "type": "string",
+      "description": "GSP language version used by this project."
+    },
+    "toolkitVersion": {
+      "type": "string",
+      "description": "Expected GSP Toolkit version."
+    },
+    "project": {
+      "type": "string",
+      "description": "Project id or name."
+    },
+    "entry": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "minLength": 1
+      },
+      "description": "Entry GSP ids."
+    },
+    "scan": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "minLength": 1
+      },
+      "description": "Directories or files scanned by the Toolkit. Defaults to design."
+    },
+    "stageRules": {
+      "type": "object",
+      "additionalProperties": {
+        "type": "object",
+        "additionalProperties": true,
+        "properties": {
+          "minResolution": {
+            "type": "string",
+            "enum": ["L0", "L1", "L2", "L3", "L4", "L5"]
+          }
+        }
+      }
+    },
+    "types": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "output": {
+      "type": "string",
+      "description": "Default Toolkit output directory."
+    }
+  }
+}