build: implementing solution library workflow support

.github/CODEOWNERS

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+# CODEOWNERS file to define ownership for solution repository
+
+# Default owner for all files in the repository
+* @aws-solutions-library-samples/maintainers
+
+# Explicit owner for the maintainer workflows configuration
+/.github/workflows/maintainer_workflows.yml @aws-solutions-library-samples/maintainers
+
+# Explicit owner for the solution ID validator script
+/.github/solutionid_validator.sh @aws-solutions-library-samples/maintainers

.github/solutionid_validator.sh

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+#!/bin/bash
+
+# Exit immediately if any command exits with a non-zero status
+set -euo pipefail
+
+# Function to display usage information
+usage() {
+    echo "Usage: $0 <solution_id>"
+    echo "Example: $0 ABC123"
+    exit 1
+}
+
+# Ensure a solution ID is provided as an argument
+if [ "$#" -ne 1 ]; then
+    echo "Error: Missing solution ID."
+    usage
+fi
+
+# Assign the solution ID to a variable
+SOLUTION_ID="$1"
+
+# Output a message about what the script is checking
+echo "Checking for solution ID: $SOLUTION_ID"
+
+# Perform the search, excluding the '.github' directory
+SEARCH_RESULT=$(grep -nr --exclude-dir='.github' "$SOLUTION_ID" ./.. || true)
+
+# Check if the search result is non-empty
+if [ -n "$SEARCH_RESULT" ]; then
+    echo -e "Solution ID '$SOLUTION_ID' found:\n"
+    echo "$SEARCH_RESULT"
+    exit 0
+else
+    echo "Solution ID '$SOLUTION_ID' not found."
+    exit 1
+fi

.github/workflows/maintainer_workflows.yml

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+# Workflows managed by aws-solutions-library-samples maintainers
+name: Maintainer Workflows
+
+on:
+  # Trigger workflows on push or pull request events for the "main" branch
+  push:
+    branches:
+      - "main"
+  pull_request:
+    branches:
+      - "main"
+    types:
+      - opened
+      - reopened
+      - edited
+
+jobs:
+  CheckSolutionId:
+    name: Validate Solution ID
+    runs-on: ubuntu-latest
+
+    steps:
+      # Step 1: Checkout the repository
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # Step 2: Validate Solution ID using the script
+      - name: Validate Solution ID
+        run: |
+          # Ensure the script is executable
+          chmod +x ./.github/solutionid_validator.sh
+          # Run the solution ID validator script with the provided solution ID
+          ./.github/solutionid_validator.sh "${{ vars.SOLUTIONID }}"
+
+      # Optional Step: Handle failures explicitly
+      - name: Handle Failure (optional)
+        if: failure()
+        run: |
+          echo "Solution ID validation failed. Please ensure the SOLUTIONID is correct."