Catalog: expose an API for consuming connectors catalog metadata and options

[oscerd]

I imagine having in camel-language-server pom, a dependency on the catalog, something like:

<dependency>
  <groupId>org.apache.camel.kafkaconnector</groupId>
  <artifactId>camel-kafka-connector-catalog</artifactId>
</dependency>

and then in Camel Language Server code, having an API Method which is returning the loaded Model as a Java Class, something like:

CamelKafkaConnectorCatalog catalog = new CamelKafkaConnectorCatalog();
List<CamelKafkaConnectorModel> connectors = catalog.getConnectors();

Originally posted by @apupier in https://github.com/apache/camel-kafka-connector/issue_comments/705513426

Related to #430