fix(client): add TODO about server IP

feat(server): dev launch script

feat(api): increase session lifetime to 30 days

feat(api): logout endpoint

feat(api): session validation

feat(api): login password verification

feat(shared): new error UserPasswordCheckFailed

feat: nix shell

chore: generalize mold

docs: wip README.md changes

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

feat(api): add redis configuration to docker-compose.dev.yaml

chore: cleanup old unneeded files