feat: add tool selection by feature param

[MQ37]

closes #166

Only docs tools category is currently enabled by default (always)

This PR introduces the tools (--tools or ?tools) comma separated list param so users can choose which tools are loaded into their MCP session.

Possible values:

• docs: Search and fetch Apify documentation tools.
• runs: Get Actor runs list, run details, and logs from a specific Actor run.
• storage: Access datasets, key-value stores, and their records.

Example:

--tools docs,runs
?tools=docs,storage

Also vibe refactored the tool loading logic so it's not duplicated in the stdio.ts

[jirispilka]

Looks good to me. The only change I would do is rename things and remove the beta flag. What do you think?

[MQ37]

Looks good to me. The only change I would do is rename things and remove the beta flag. What do you think?

Agree, renamed and moved the beta tools to preview tools category 👍 Thank you for review

[MichalKalita]

👍