chore(client, server, shared): update naia to 0.20.{0,1}

feat(schema, shared, api): move all types to shared, separate schema
 * schema is now stored in a separate crate to avoid dependency cycles
 * added note in README.md about handling unwraps

Merge remote branch 'origin/dev'

wip!(client, server, shared): initial updating to bevy 0.10

feat(shared): add cookie support for reqwest

feat!(client, shared): move api calls to shared, dep shuffle,
and remove connection check stage

chore(client, server, shared): update naia deps

docs: small doc updates

feat(shared): serialize APIError

feat(shared): impl most previous api errors

Signed-off-by: Jonni Liljamo <jonni@liljamo.com>

chore(client, server, shared): add naia deps

chore: update licenses

feat: add shared, server, api