ci: Add github action to make sure changelog for @excalidraw/excalidraw is updated (#2518)

Add guidelines for changelog and group the commits
update the changelog with the latest commits since the last release
Co-authored-by: Lipis <lipiridis@gmail.com>

scripts/changelog-check.js

@@ -0,0 +1,34 @@
+const { exec } = require("child_process");
+
+const changeLogCheck = () => {
+  exec(
+    "git diff origin/master --cached --name-only",
+    (error, stdout, stderr) => {
+      if (error || stderr) {
+        process.exit(1);
+      }
+
+      if (!stdout || stdout.includes("packages/excalidraw/CHANGELOG.MD")) {
+        process.exit(0);
+      }
+
+      const onlyNonSrcFilesUpdated = stdout.indexOf("src") < 0;
+      if (onlyNonSrcFilesUpdated) {
+        process.exit(0);
+      }
+
+      const changedFiles = stdout.trim().split("\n");
+      const filesToIgnoreRegex = /src\/excalidraw-app|packages\/utils/;
+
+      const excalidrawPackageFiles = changedFiles.filter((file) => {
+        return file.indexOf("src") >= 0 && !filesToIgnoreRegex.test(file);
+      });
+
+      if (excalidrawPackageFiles.length) {
+        process.exit(1);
+      }
+      process.exit(0);
+    },
+  );
+};
+changeLogCheck();