golem-cli: support easily parseable output for `golem component templates`

[mschuwalow]

For example, in the desktop app the templates need to be extracted from the command output. It would be nice to support json / yaml output for this command that is easier to parse:

❯ golem component templates

Available languages and templates:
- TypeScript
  - ts: A simple agent implementing a counter
  - ts/human-in-the-loop: An example agent using promises to implement a human in the loop workflow.
  - ts/llm-session: LLM chat with durable history
  - ts/snapshotting: A simple agent implementing a counter with custom state snapshotting
  - ts/websearch-summary-example: An example agent using the golem-ai library to search the web and summarize the results.