feat: update RomM package to 5.1.0

- pin the RomM 5.1.0 multi-architecture image
- mount the main volume at /romm for hardlink support
- update release notes, configuration text, and documentation
- replace the invalid icon with the official RomM isotipo
- ignore local AI workspace files and build artifacts

docker-images/mariadb/Dockerfile

@@ -0,0 +1,10 @@
+FROM mariadb:11.4.5@sha256:49117dcc565cf51aa57ac5fca59ab31213402ff0eae6ffc13c46a37b938f7e4b
+
+# start-sdk 2.0.9's logical backup helper invokes the legacy MySQL command
+# names. MariaDB 11.4 ships only mariadb-* names, so expose compatibility
+# aliases until these commands are configurable by the SDK.
+RUN ln -s /usr/bin/mariadb-admin /usr/local/bin/mysqladmin \
+    && ln -s /usr/bin/mariadb-dump /usr/local/bin/mysqldump \
+    && ln -s /usr/bin/mariadb /usr/local/bin/mysql \
+    && ln -s /usr/bin/mariadb-install-db /usr/local/bin/mysql_install_db \
+    && ln -s /usr/sbin/mariadbd /usr/local/bin/mysqld