Update the MCP and toolbox tools

[tonilastre]

The core idea behind the AI toolbox tool list update is the following:

• If a tool is a wrapper of another tool -> remove that tool, e.g., ShowSchemaInfoTool is pretty much CypherTool with query: SHOW SCHEMA INFO
• If an action/tool needs some custom logic -> add that as a tool. This adds a requirement for SearchSchemaTool which pretty much works as a Grep on top of graph schema, giving out any matches on nodes/edges/enums searching for labels, property keys, values, descriptions. To add to that, an additional three tools, NodeSchema, EdgeSchema, EnumSchema can give the LLM full info on specific node label, edge label, or enum. It also fixes the issue when SHOW SCHEMA INFO returns a very large schema, filling out the LLM context. It also enables LLM to localize the search area.

What is being updated in this PR:

• Tools in the ai-toolbox
• Tools in the memgraph-mcp
• Tools in the langchain integration