Documentation updates
- Delphitools command reference. Documented the command groups shown in the interactive
/helpmenu. Clarified that the Commands page lists the commands Freesona exposes in Discord and thatdt <command> --helpshows options for a Delphitools command. - Delphitools executable configuration. Added
DELPHITOOLS_EXECUTABLEto the environment-variable reference. The default executable name isdt.