ci: Add pre-commit hook to catch issues locally

The Git hooks force the developers to satisty
certain rules before commiting changes(locally).

Following checks will be run before allowing developers
to commit changes:
1. Check if the commit message has a valid sign-off.
2. Catch gofmt issues, if any.
3. Verify syntax of yaml and json files.(if present)
4. Makes sure that files end in a new line.
5. Trims trailing whitespace.
6. Run commitlint check on the commit message.

The developers will not be allowed to commit changes
without satisfying the above mentioned rules; This will
inturn help in avoiding failures on CI.

Signed-off-by: Yug <yuggupta27@gmail.com>

.pre-commit-config.yaml

@@ -0,0 +1,35 @@
+---
+repos:
+
+  # Check if the commit message has a valid sign-off.
+  - repo: https://github.com/gklein/check_signoff
+    rev: v1.0.5
+    hooks:
+      - id: check-signoff
+
+  # Catch gofmt issues, if any.
+  - repo: git://github.com/dnephin/pre-commit-golang
+    rev: v0.3.5
+    hooks:
+      - id: go-fmt
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.5.0
+    hooks:
+      # Verify syntax of yaml and json files.
+      - id: check-json
+      - id: check-yaml
+        args: [--multi]
+
+      # Makes sure that files end in a new line.
+      - id: end-of-file-fixer
+
+      # Trims trailing whitespace.
+      - id: trailing-whitespace
+
+  # Run commitlint check on the commit message.
+  - repo: https://github.com/alessandrojcm/commitlint-pre-commit-hook
+    rev: v2.2.0
+    hooks:
+      - id: commitlint
+        stages: [commit-msg]