feat: add changelog to release (#11)

- closes #5

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Reviewed-on: https://codeberg.org/forgejo-contrib/forgejo-helm/pulls/11

tools/changelog.mjs

@@ -0,0 +1,18 @@
+import conventionalChangelogCore from 'conventional-changelog-core';
+import conventionalChangelogPreset from 'conventional-changelog-conventionalcommits';
+import fs from "node:fs"
+
+const config = conventionalChangelogPreset();
+
+const file = process.argv[3] ? fs.createWriteStream(process.argv[3]): process.stdout;
+
+conventionalChangelogCore(
+  {
+    config,
+    releaseCount: 2,
+  },
+  { version: process.argv[2], linkCompare: false },
+  undefined,
+  undefined,
+  { headerPartial: '' }
+).pipe(file);