refactor(git,gists): type repository tree and gist MCP tools

Expose concrete output schemas and structured content for get_repository_tree, list_gists, get_gist, create_gist and update_gist on supported protocol versions while preserving legacy arguments, error text, pagination, IFC labels and scopes.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: SamMorrowDrums

pkg/github/__toolsnaps__/create_gist.snap

@@ -31,5 +31,21 @@
     ],
     "type": "object"
   },
-  "name": "create_gist"
+  "name": "create_gist",
+  "outputSchema": {
+    "additionalProperties": false,
+    "properties": {
+      "id": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "url"
+    ],
+    "type": "object"
+  }
 }

pkg/github/__toolsnaps__/create_gist_typed.snap

@@ -0,0 +1,63 @@
+{
+  "annotations": {
+    "idempotentHint": false,
+    "readOnlyHint": false,
+    "title": "Create Gist"
+  },
+  "description": "Create a new gist",
+  "icons": [
+    {
+      "mimeType": "image/png",
+      "src": "data:image/png;base64,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",
+      "theme": "light"
+    },
+    {
+      "mimeType": "image/png",
+      "src": "data:image/png;base64,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",
+      "theme": "dark"
+    }
+  ],
+  "inputSchema": {
+    "properties": {
+      "content": {
+        "description": "Content for simple single-file gist creation",
+        "type": "string"
+      },
+      "description": {
+        "description": "Description of the gist",
+        "type": "string"
+      },
+      "filename": {
+        "description": "Filename for simple single-file gist creation",
+        "type": "string"
+      },
+      "public": {
+        "default": false,
+        "description": "Whether the gist is public",
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "filename",
+      "content"
+    ],
+    "type": "object"
+  },
+  "name": "create_gist",
+  "outputSchema": {
+    "additionalProperties": false,
+    "properties": {
+      "id": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "url"
+    ],
+    "type": "object"
+  }
+}