Add yamlling workflow

Signed-off-by: smoshiur1237 <[email protected]>

Author: smoshiur1237

.github/workflows/yamllint.yaml

@@ -0,0 +1,61 @@
+---
+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: Extract YAML snippets from md files
+      run: |
+        set -euo pipefail
+        mkdir -p .yaml-snippet
+
+        # Process each md file
+        while IFS= read -r md_file; do
+          echo "Processing: ${md_file}"
+
+          # Get safe filename based on full path
+          safe_name=$(echo "${md_file}" | sed 's/[\/\.]/_/g')
+
+          # Extract YAML code blocks and save each one
+          awk -v base="${safe_name}" '
+            BEGIN { count=0 }
+            /^```(yaml|yml)/ { in_block=1; next }
+            /^```/ && in_block {
+              if (block != "") {
+                count++
+                file = sprintf(".yaml-snippet/%s_snippet_%03d.yaml", base, count)
+                print block > file
+                close(file)
+                block = ""
+              }
+              in_block=0
+              next
+            }
+            in_block { block = (block == "" ? $0 : block "\n" $0) }
+          ' "${md_file}"
+        done < <(find . -name "*.md" -not -path "./.git/*")
+
+        echo "Extracted $(ls -1 .yaml-snippet/*.yaml 2>/dev/null | wc -l) YAML snippet(s)"
+    - name: yaml-lint
+      uses: ibiqlik/action-yamllint@2576378a8e339169678f9939646ee3ee325e845c # v3.1.1
+      with:
+        config_file: .yamllint.yaml
+
+    - name: yaml-lint for md snippets
+      uses: ibiqlik/action-yamllint@2576378a8e339169678f9939646ee3ee325e845c # v3.1.1
+      with:
+        config_file: .yamllint.yaml
+        file_or_dir: .yaml-snippet/
+        strict: true

.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' ]