chore(changeset): add custom commit message

Author: codingmatty

.changeset/commit.js

@@ -0,0 +1,10 @@
+exports.default = {
+  getAddMessage: ({ releases, summary }) => {
+    const { type } = releases[0];
+    const scopes = releases
+      .map((release) => release.name.replace("@typespec-tools/", ""))
+      .join(",");
+    return `${type}(${scopes}): ${summary}`;
+  },
+  // getVersionMessage
+};

.changeset/config.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://unpkg.com/@changesets/config@3.0.3/schema.json",
   "changelog": "@changesets/cli/changelog",
-  "commit": false,
+  "commit": ["./commit.js", { "customOption": true }],
   "fixed": [
     [
       "@typespec-tools/emitter-express",