feat: migrate CI from Travis to GitHub Actions with enhancements

- Convert Travis CI configuration to GitHub Actions workflows
- Add multi-arch Docker builds (amd64/arm64)
- Implement initial schema migration for fresh database installs
- Add multi-attribute search with AND logic and sort by attribute columns
- Address various PR review feedback and formatting fixes

.github/workflows/phpunit.yml

@@ -69,9 +69,6 @@ jobs:
       - name: Install npm dependencies
         run: npm install
 
-      - name: Build database.sql
-        run: npm run gulp build-database
-
       - name: Start MariaDB
         run: |
           docker run -d --name mysql \
@@ -79,7 +76,6 @@ jobs:
             -e MYSQL_DATABASE=ospos \
             -e MYSQL_USER=admin \
             -e MYSQL_PASSWORD=pointofsale \
-            -v $PWD/app/Database/database.sql:/docker-entrypoint-initdb.d/database.sql \
             -p 3306:3306 \
             mariadb:10.5
           # Wait for MariaDB to be ready