Implement INFO command

currently returns:
- copyright info
- author info
- website and irc channel
- version
- build date

sable_ircd/src/command/handlers/info.rs

@@ -0,0 +1,45 @@
+use super::*;
+
+
+#[command_handler("INFO")]
+/// Syntax: INFO
+fn info_handler(
+    _network: &Network,
+    response: &dyn CommandResponse,
+    _source: UserSource,
+    server: &ClientServer,
+) -> CommandResult {
+    let authors = include_str!("../../../../AUTHORS").trim_end();
+    let node = server.node();
+    let version = node.version();
+    let build_date = node.build_date();
+
+    let info_text = format!("Sable --
+
+Copyright (c) 2021-2024 Sable Development Team
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published
+by the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Development is led by:
+
+{authors}
+
+A full list of contributors can be found in the git log.
+
+Visit the Sable website at: https://sable.chat/
+Visit us on IRC at irc.libera.chat #libera-dev
+
+Version: {version}
+Build date: {build_date}");
+
+    for line in info_text.lines() {
+        response.numeric(make_numeric!(Info, line));
+    }
+    // TODO: send configuration info to opers
+    // see: https://github.com/solanum-ircd/solanum/blob/main/modules/m_info.c#L788
+    response.numeric(make_numeric!(EndOfInfo));
+    Ok(())
+}

sable_ircd/src/command/mod.rs

@@ -42,6 +42,7 @@ mod handlers {
     mod ban;
     mod cap;
     mod chathistory;
+    mod info;
     mod invite;
     mod join;
     mod kick;

sable_ircd/src/messages/numeric.rs

@@ -67,6 +67,9 @@ define_messages! {
 
     381(YoureOper)              => { ()                         => "You are now an IRC operator" },
 
+    371(Info)                   => { (line: &str)               => ":{line}" },
+    374(EndOfInfo)              => { ()                         => ":End of /INFO list" },
+
 
     401(NoSuchTarget)           => { (unknown: &str)            => "{unknown} :No such nick/channel" },
     402(NoSuchServer)           => { (server_name: &ServerName) => "{server_name} :No such server" },