Add an `hb-shape`-like utility

[khaledhosny]

Would be useful in the same way hb-shape is useful.

[khaledhosny]

I just found examples/shape.rs, which seems to do what I want. Though the first thing I tried was cargo run and it gave me an error:

error: a bin target must be available for `cargo run`

So may be we should have a bin target (whatever that is) that uses this example code?

[LaurenzV]

You need to run cargo run --example shape -- {arguments}

[khaledhosny]

Thanks! That is good enough then.

[behdad]

Since this is a one-trick crate, would be nice if cargo run just did it without the extra argument. Bonus points for installing hb-shape.

[rsheeter]

I suspect we'll find that we want separate crates for binaries because of rust-lang/cargo#1982.

Edit: perhaps that suggests harfruzz become a workspace?

[behdad]

I suspect we'll find that we want separate crates for binaries because of rust-lang/cargo#1982.

Edit: perhaps that suggests harfruzz become a workspace?

Yeah that's what I was thinking.