chore: add GitHub workflows, issue templates, and changelog

- Tests, Pint, Release, Changelog, Auto-merge, Deploy Docs workflows
- Bug report template, security policy, contributing guide
- Dependabot config for GitHub Actions
- Remove .idea from tracking
- Keep only premium packages in ecosystem section

.github/dependabot.yml

@@ -0,0 +1,12 @@
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    labels:
+      - "dependencies"