fix(security): Replace eval() with ast.literal_eval() in knowledges.py for safer evaluation

[liangzhang-keepmoving]

Security Fix

This PR addresses the security vulnerability in superagi/controllers/knowledges.py where eval() was being used on marketplace-sourced data.

The Problem

The uninstall_selected_knowledge function was using eval() to parse the vector_ids field from marketplace-sourced knowledge configurations. This could allow a malicious marketplace knowledge package to execute arbitrary code when uninstalled.

The Solution

Replaced eval() with ast.literal_eval() which safely evaluates Python literals without executing arbitrary code.

Changes Made

1. Added import ast at the top of the file
2. Changed vector_ids = eval(knowledge_config["vector_ids"]) to vector_ids = ast.literal_eval(knowledge_config["vector_ids"])

Testing

The fix maintains the same functionality while providing a safe alternative to eval() for parsing the vector IDs from the knowledge configuration.

This is part of a series of PRs to fix all eval() usage vulnerabilities in the codebase.