Simple key mapping doesn't work

I am trying to do a very simple key remapping, basically remap `§` to ` (tick) and get the buttons inverted.

I tried the below configs:
```
0x0A : 0x32
```
```
0x0A = 0x32
```
```
0x0A -> 0x32
```

Nothing works so I'm opening an issue here to ask if this is even possible and if so, please provide examples as the current documentation is very ambiguous and completely lacks examples.

Permissions have been given and I've restarted the service for each change to make sure it's loaded.

Start by reading the existing key-mapping documentation and checking the three syntax examples against skhd's accepted configuration format. Done means documenting the supported mapping syntax and providing a working §-to-backtick example.

Written by the indexing model from the issue text.