allow selecting a subset of rooms

This can make debugging a specific room much easier/faster.

src/cli.rs

@@ -6,6 +6,7 @@
 use std::path::PathBuf;
 
 use clap::{Parser, Subcommand};
+use ruma::OwnedRoomId;
 
 use crate::{
     config::{default_tracing_filter, EnvFilterClone, LogFormat},
@@ -107,6 +108,12 @@ pub(crate) struct GetRoomStatesArgs {
     #[clap(long, short)]
     pub(crate) recompute: bool,
 
+    /// Limit the output to a subset of rooms by their IDs
+    ///
+    /// This option can be specified multiple times.
+    #[clap(long, short)]
+    pub(crate) select: Vec<OwnedRoomId>,
+
     #[clap(flatten)]
     observability: ObservabilityArgs,
 }