1. Follows advice from
https://sol2.readthedocs.io/en/latest/functions.html to use
`set_function` when binding functions.
2. Adds autocomplete support for userdata methods.
3. Simplifies property bindings and improves string handling.
Fully migrates debug commands to Lua and organizes them into logical
groups.
The CLI `+` syntax now runs Lua, e.g.:
```bash
build/devilutionx '+dev.player.trn.plr("infra")'
```
Chat hotkeys run Lua code if they start with `/lua`, e.g.:
```ini
[NetMsg]
QuickMessage1=/lua message(dev.player.info())
```