Add .pre-commit-config.yaml

.pre-commit-config.yaml

+repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v3.4.0
+  hooks:
+  - id: check-yaml
+    args: [--allow-multiple-documents]
+- repo: https://github.com/gruntwork-io/pre-commit
+  rev: v0.1.12
+  hooks:
+  - id: helmlint