fix(python/core): use "important" tag when querying tools list

[jkomyno]

This PR:

• fixes the composio.tools.get(user_id=user_id, toolkits=["GMAIL"]) command used in https://docs.composio.dev/docs/quickstart, so that the GMAIL_FETCH_EMAILS tool is retrieved
• sets important=True to calls to self._client.tools.list

---

Note

Passes important="true" when listing tools to filter to important tools in both slug and toolkit/search paths.

• Python core:
  • In python/composio/core/models/tools.py, get_raw_composio_tools now passes important="true" to self._client.tools.list for both slug-based and toolkit/search queries, filtering to important tools.

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[cursor]

Bug: Filtering important tools excludes explicitly requested tools

When users explicitly request specific tools by slug, the important=True filter could exclude tools that weren't marked as important but were explicitly requested. This violates the principle that explicit requests should always be honored. The filter should only apply to toolkit-based and search-based queries, not slug-based queries where the user has explicitly named the tools they need.