Custom commands for opencode.
This option can either be:
- An attribute set defining commands
- A path to a directory containing multiple command files
If an attribute set is used, the attribute name becomes the command filename,
and the value is either:
- Inline content as a string (creates
opencode/commands/<name>.md)
- A path to a file (creates
opencode/commands/<name>.md)
If a path is used, it is expected to contain command files.
The directory is symlinked to $XDG_CONFIG_HOME/opencode/commands/.