Lessen the amount of FFI

[strawmelonjuice]

Goal is to lessen the amount of FFI used in both client and server, this should improve code readability and trustworthyness as well as lessen possible overhead...... and code-aesthetically be more pleasing

This is not an explicit goal, but one that should be considered while making new changes.

Currently there are 8 different FFI modules.

The reform merging client and server will also mean some modules can be merged, as for example the prompt or timestamps module will resolve into the wider utils module.

[strawmelonjuice]

With release 1.3.0, the typescript code makes up a little less than 6%, with the next release getting a lot of Gleam-written new code, this'll become even less.

We're doing great!