doc: recursive reference

[lwlsn]

For the "MIDI & Osc page"

https://strudel.cc/learn/input-output/

The pattern osc refers back to the current page for more information about OSC.

Would be good to have a more in-depth overview of sending and receiving

[kdiab]

I read through the documentation and I don't know what it could be changed to. Was thinking about either referring to wikipedia for more reading on OSC or removing the section all together because it's a circular link. @felixroos @yaxu what do you think?

[felixroos]

maybe show some example / use cases of osc besides superdirt but not sure what those would be. probably also related to #623

[felixroos]

midi docs is also a bit behind, some features listed in #192 are still undocumented

[kdiab]

I read through these and I can't make out what these functions do, mainly due to a lack of experience :(