Grails 7 - plugin-ui needs updated to latest js dependencies

### Issue description

plugin-ui has not been updated to the latest js dependencies. See commits:
* f5e348d354903c5428bb932aacc2c0d483b3a5c0 - initial work
* 44a17cf1dbe2f4f493729515ed5cfcdd50e38855 - revert after discovering the scope

Also note that there are several existing errors of not being able to find various css/js files without any upgrades. Significant test failures occur (likely due to the bootstrap / datatables upgrades) so the html needs updated to work with the newer dependencies.

Start in plugin-ui by reviewing commits f5e348d354903c5428bb932aacc2c0d483b3a5c0 and 44a17cf1dbe2f4f493729515ed5cfcdd50e38855 to understand the dependency-update scope. Reproduce the existing missing CSS/JS errors and test failures, especially those related to Bootstrap and DataTables. Done means the newer dependencies load, the HTML works with them, and the significant test failures are resolved.

Written by the indexing model from the issue text.