feat(remote-dev): forward ports of the remote host (#1131)

Remote windows get a Ports tool window: forward localhost:<port> of the remote host to this machine (same port when free here), with Open in Browser / Copy / Stop. Forwarded ports are remembered per host and folder and forwarded again on reconnect. Tunnels reuse the window's SSH session (ide_ssh::Tunnel can prefer a local port) and close with the connection.

Closes #819

src/bindings.ts

@@ -1116,6 +1116,15 @@ export const commands = {
 	commands: string[],
 } | null>("remote_current"),
 	remoteDisconnect: () => __TAURI_INVOKE<void>("remote_disconnect"),
+	/**  The remote ports this window forwards to this machine. */
+	remoteForwardedPorts: () => __TAURI_INVOKE<ForwardedPort[]>("remote_forwarded_ports"),
+	/**
+	 *  Forwards `localhost:<remote_port>` of the remote host to the same port here when it is free,
+	 *  else to a free one. Nothing needs to listen there yet; connections are opened per use.
+	 */
+	remoteForwardPort: (remotePort: number) => typedError<ForwardedPort, IdeError>(__TAURI_INVOKE("remote_forward_port", { remotePort })),
+	/**  Stops forwarding `remote_port`. */
+	remoteStopForwarding: (remotePort: number) => typedError<null, IdeError>(__TAURI_INVOKE("remote_stop_forwarding", { remotePort })),
 	/**
 	 *  Runs a command on the window's remote server; `args` and the result are JSON
 	 *  text. Streaming arguments are `{ "$channel": id }`; their values arrive on
@@ -3464,6 +3473,12 @@ export type FormatOptions = {
 	tool?: ExternalFormatter | null,
 };
 
+/**  A port of the remote host reachable on this machine at `localhost:local_port`. */
+export type ForwardedPort = {
+	remotePort: number,
+	localPort: number,
+};
+
 /**  One occurrence of a duplicated code fragment. */
 export type Fragment = {
 	path: IpcPath,