[Feature]: Macro support

### Pre-flight checklist

- [x] I searched existing issues and the [Roadmap](https://github.com/AprilNEA/OpenLogi#roadmap), and this isn't already tracked.

### Problem / motivation

The original Logitech software supports macros using the Lua language. Currently, this software does not support macros, as I understand.

### Proposed solution

It would be great to have the ability to write macros in Lua or TypeScript. Sometimes this is very convenient - being able to create a script for a single key or a keyboard combination. Maybe this could be used for that: https://rhai.rs/

### Alternatives considered

_No response_

### Related area(s)

- [x] GUI
- [ ] CLI
- [x] Button actions / remapping
- [ ] DPI
- [ ] SmartShift
- [ ] Per-application profiles
- [ ] Configuration (TOML)
- [ ] Auto-update
- [x] Other

### Additional context

_No response_

Start by reviewing the GUI and button-actions/remapping areas mentioned in the issue, then trace how existing actions are represented and executed. The scope, scripting language, isolation model, and completion criteria need to be defined before implementation can begin.

Written by the indexing model from the issue text.