Add yamlling workflow

Signed-off-by: smoshiur1237 <moshiur.rahman@est.tech>

Author: smoshiur1237

.github/workflows/yamllint.yaml

@@ -0,0 +1,22 @@
+---
+name: yamllint
+on:
+  pull_request:
+    types: [ opened, edited, synchronize, reopened ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Install yamllint
+      run: sudo apt-get update && sudo apt-get install -y yamllint
+
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+
+    - name: yaml-lint
+      uses: ibiqlik/action-yamllint@2576378a8e339169678f9939646ee3ee325e845c # v3.1.1
+      with:
+        config_file: .yamllint.yaml

.yamllint.yaml

@@ -0,0 +1,14 @@
+yaml-files:
+- '*.yaml'
+- '*.yml'
+- '.yamllint'
+
+rules:
+  trailing-spaces: enable
+  key-duplicates: enable
+  indentation:
+    spaces: 2
+    indent-sequences: false # Enforce k8s-style indentation
+    check-multi-line-strings: false
+  truthy:
+    allowed-values: [ 'true', 'false', 'yes', 'no', 'on' ]