(Experimental) External CLI plugins -29kb DFU

Idea and plugin loader implementation by @akopachov, thanks!
All commands done except storage and rpc for latency reasons

applications/main/ibutton/ibutton_cli.c

@@ -8,19 +8,6 @@
 #include <ibutton/ibutton_worker.h>
 #include <ibutton/ibutton_protocols.h>
 
-static void ibutton_cli(Cli* cli, FuriString* args, void* context);
-
-// app cli function
-void ibutton_on_system_start() {
-#ifdef SRV_CLI
-    Cli* cli = furi_record_open(RECORD_CLI);
-    cli_add_command(cli, "ikey", CliCommandFlagDefault, ibutton_cli, cli);
-    furi_record_close(RECORD_CLI);
-#else
-    UNUSED(ibutton_cli);
-#endif
-}
-
 static void ibutton_cli_print_usage() {
     printf("Usage:\r\n");
     printf("ikey read\r\n");
@@ -252,3 +239,15 @@ void ibutton_cli(Cli* cli, FuriString* args, void* context) {
 
     furi_string_free(cmd);
 }
+
+#include <flipper_application/flipper_application.h>
+
+static const FlipperAppPluginDescriptor plugin_descriptor = {
+    .appid = "ibutton_cli",
+    .ep_api_version = 1,
+    .entry_point = &ibutton_cli,
+};
+
+const FlipperAppPluginDescriptor* ibutton_cli_plugin_ep() {
+    return &plugin_descriptor;
+}