Add support for special keys about opendiscord

[CrumblyLiquid]

Deffinitely should be done after #2 is done!

Would want to make some sort of comprehensive system for that.
Goals:

• Be able to use special keys in combination with normal keys, etc.
• Be able to use duration for different keys

Notation: (this is just an example as how that could work, nothing final yet)
Prefix:
/<duration>;<before>;<after>/
Example: /40~10;115~50;150~80/
Notes:

• can be used to set global timings for the whole sequence if no specific timings are set;
• duration must be set, if before and after aren't set duration will be used;
• might be good to introduce a global prefix for all commands too;

Key:
<key>(<duration>);
Example: a(250~5);b(230~10);
Notes:

• press key for duration ms, ended with semicolon; ~ after the duration can be used to randomize the press time

Modifier:
{<key>(<before>, <after>):[<key>; ...]}
Example: {SHIFT(30~5,30~5):[a(50~15);b(50~15);c(50~15)]}
Notes:

• press key while pressing other keys;
• before says for how much miliseconds the modifier key should be pressed before it presses other keys, the same goes for after which happens after the execution of all the keys;
• all keys should be encompassed in [] and should be in the key format described above;

Full example: /50~10/{SHIFT(30~5,20~5):[a;b;c;d(80);e(10~3);f;g]};f;a;x