add debug console initial implementation

src/game/debug/console/cli.rs

@@ -0,0 +1,32 @@
+use clap::{Parser, Subcommand};
+
+use crate::game::debug::DebugEvent;
+
+pub(super) fn respond(line: &str) -> Result<DebugEvent, String> {
+    let might_be_help_call = line.contains("help") || line.contains("-h");
+    let args = shlex::split(line).ok_or("Invalid Quoting")?;
+    let cli = Cli::try_parse_from(args).map_err(|e| e.to_string());
+
+    if might_be_help_call && cli.as_ref().is_err_and(|item| item.starts_with("Usage: ")) {
+        let Err(s) = cli else { unreachable!() };
+        return Ok(DebugEvent::PrintToConsole(s));
+    }
+
+    Ok(match cli?.cmd {
+        Commands::Close => DebugEvent::CloseDebugConsole,
+        Commands::Echo { text } => DebugEvent::PrintToConsole(text),
+    })
+}
+
+#[derive(Debug, Parser)]
+#[command(multicall = true)]
+struct Cli {
+    #[command(subcommand)]
+    cmd: Commands,
+}
+
+#[derive(Debug, Subcommand)]
+enum Commands {
+    Close,
+    Echo { text: String },
+}