Add support for some newer DuckyScript features to BadKb

[x10102]

What's new

Adds support for a couple of new commands to the BadKB scripting language.

Command	Description	Notes
CAPS [ON|OFF]	Ensures that CapsLock is on/off based on the keyboard's current LED state	Similar function to DS $_CAPSLOCK_ON
RANDOM_LETTER RANDOM_LOWERCASE_LETTER RANDOM_UPPERCASE_LETTER RANDOM_NUMBER RANDOM_SPECIAL RANDOM_CHAR	Generates a random character and sends it to the host	Equivalent function to the DS random keystroke injection features
VOLUME [0-1] BEEP [FREQ] [MS]	Plays a tone using the integrated buzzer	This one is a bit silly and doesn't have a DS equivalent, but can be used as an audio prompt before WAIT_FOR_BUTTON_PRESS or to notify that a particularly long script has finished

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For the reviewer

• I've uploaded the firmware with this patch to a device and verified its functionality
• I've confirmed the bug to be fixed / feature to be stable

[WillyJL]

same as #372:

unfortunately this came in at a bad time. badkb was behind on a few OFW refactors, since those refactors did not add any functionality that badkb didnt already have, but it meant that it was quite differently structured. i just spend the last 3 days rewriting badkb on top of ofw's "new" badusb structure, so now this pr will probably need some reworking.

also, i would prefer if you tried to contribute this to official firmware first, everything that gets added downstream here becomes an additional maintenance burder when inevitably ofw will change things once again. if they reject these additions, then i will have a look and possibly accept them here

i know this pr didnt really come in at that bad time, but it got to this bad time due to me not looking at it sooner, thats my bad.

still, i would prefer if you tried to contribute this to official firmware first. if declined, i will accept it here

[x10102]

Understood. I'll make a PR on the OFW repo when I have the time.