feat(api): get /api/user for public user details

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

feat(api): reimpl all_games and my_games

fix(api): use gamestate consts

feat(api): stubs for most game endpoints, complete create

feat(client): init game handlers module

feat(api): impl models action, gamedata, game

feat(api): create session on register

feat(api): increase session lifetime to 30 days

feat(api): logout endpoint

feat(api): session validation

feat(api): login password verification

WIP(api): session management

fix(api): /ping -> /api/ping

docs: small doc updates

feat(api): init redis session backend

chore(api): add actix-session dep

chore(api): format Cargo.toml

fix(api): update dev-launch.sh with redis url in wanted format

fix(api): update dev-launch.sh with valid cookie signing key