Membership refactor

Introduce deactivate, membership services

Move membership and user deactivation functions from api crate into those services

src/service/membership/mod.rs

@@ -0,0 +1,22 @@
+mod ban;
+mod invite;
+mod join;
+mod kick;
+mod leave;
+mod unban;
+
+use std::sync::Arc;
+
+use tuwunel_core::Result;
+
+pub struct Service {
+	services: Arc<crate::services::OnceServices>,
+}
+
+impl crate::Service for Service {
+	fn build(args: crate::Args<'_>) -> Result<Arc<Self>> {
+		Ok(Arc::new(Self { services: args.services.clone() }))
+	}
+
+	fn name(&self) -> &str { crate::service::make_name(std::module_path!()) }
+}