Add missing description, examples and schema for the Quarkus actions

[cmoulliard]

Issue

Add the missing description, examples and schema for our Quarkus actions to allow to document them when the user opens http://localhost:3000/create/actions

We dont set the field description part of our actions using createTemplateAction like examples and our schema is not exposed !!

Example of what we should do:

  return createTemplateAction<{ url: string; targetPath: string }>({
    id: 'fetch:plain:file',
    description: 'Downloads single file and places it in the workspace.',
    examples,
    schema: {
      input: {
        type: 'object',
        required: ['url', 'targetPath'],
        properties: {
          url: {
            title: 'Fetch URL',
            description:
              'Relative path or absolute URL pointing to the single file to fetch.',
            type: 'string',
          },
...