fastn xtask crate

[amitu]

This is for people who want to use the xtask pattern for their repos.

Example Tasks

install-fastn

Right now all fastn apps READMEs tell you to install fastn. We can create a task to install latest fastn from github repository. Installing fastn from source maybe too slow so this may be handy.

fastn launchers

In earlier discussion I mentioned fastn launchers, we can have a task that does that, calling fastn update first intelligently till fastn serve --no-update is implemented.

Ideally the launcher will internally call install fastn task so things are seamless. cargo xtask run-ui etc.

Wasm compilation

We also have scripts for compiling wasm, and for optimising it, we can expose tasks for both.

Import Google Font

Improve the process of creating font packages #2094

Implementation Detail

This has to be a separate library crate, published on crates.io. This will expose these helpers functions. We can even create a clap helper, which will auto add these tasks to passed clap, or return some clap data structure.