Improve default configuration for web builds #487
Description
We have control over the default compilation profiles and wasm-opt options used for web builds.
The current options are chosen relatively arbitrarily and not based on benchmark results. Instead, we should use all the data gathered in TheBevyFlock/bevy_new_2d#402 to choose defaults that are best for most projects.
The linked issue mostly optimizes for file size or runtime performance.
For dev builds, we want to optimize for "iteration speed", i.e. build time + load time. This might need further investigation to find the best defaults.