[Roadmap] Query Editor Enhancements

## Description

We envision a query editing experience with syntax highlighting, auto-indentation, and schema-aware autocompletion.

## High-Level Plan

Potential scope:

- Replace textarea with a code editor (e.g., Monaco)
- Syntax highlighting for Gremlin, openCypher, and SPARQL
- Autocomplete for vertex types, edge types, and properties

## Disclaimer

This is a high level roadmap item. The details of the implementation and the described scope could change as the project evolves.

> [!IMPORTANT]
> Internal only — this issue is maintained by the core team and is not accepting external contributions.