Added linter to add new line

Signed-off-by: Owais Kazi <[email protected]>

.github/workflows/new-line.yml

@@ -0,0 +1,14 @@
+name: Code Hygiene
+
+on: [push, pull_request]
+
+jobs:
+  linelint:
+    runs-on: ubuntu-latest
+    name: Check if all files end in newline
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Linelint
+        uses: fernandrone/[email protected]

.linelint.yml

@@ -0,0 +1,20 @@
+# 'true' will fix files
+autofix: true
+
+ignore:
+  - .git/
+  - .gradle/
+  - '*.sha1'
+  - '*.txt'
+  - 'buildSrc/src/testKit/opensearch.build/LICENSE'
+  - 'buildSrc/src/testKit/opensearch.build/NOTICE'
+  - 'server/licenses/apache-log4j-extras-DEPENDENCIES'
+
+rules:
+  # checks if file ends in a newline character
+  end-of-file:
+    # set to true to enable this rule
+    enable: true
+
+    # if true also checks if file ends in a single newline character
+    single-new-line: true