Stable Serialization of Features

[cwfitzgerald]

Description

CI on #2618 failed because the clear command feature flag changed, but the serialized ron traces explicitly output the bitflags, so no longer enabled the clear feature once the flag moved identity.

We should have a serialization that is more stable than this, as we shouldn't be relying on the exact bits.

[coderedart]

related to #1195 maybe.
bitflags/bitflags#262 bitflags 2.0 is considering serializing bitflags as text for human readable formats like json / ron while still using binary for binary formats like bincode.

[KodrAus]

This is something you should be able to support with the work we've been doing in bitflags where the names of enabled flags can be iterated over along with their values. This is what's now driving our Debug implementation and could be used for serde too if you'd rather anchor to names rather than values.

The main piece of implementation work left before we can put together a 2.0 release that includes the new stuff is: bitflags/bitflags#282

[coderedart]

bitflags 2.0 is released on crates.io.