feat(daemon, cli): global DaemonConfig and an ability to get/save it using cli (#174)

* use one global Arc<DaemonConfig>

* implement commands

* replace Arc<DaemonConfig> with Arc<Mutex<DaemonConfig>> and fix pwsp-gui

* add pwsp-cli support

* replace serde_json::to_string_pretty with to_string

* refactor

* implement UpdateDaemonConfigCommand and use it in pwsp-gui so it now uses real in-memory config, not the saved one

* implement utils::gui get_daemon_config and update_daemon_config to simplify code

pwsp-lib/src/utils/gui.rs

@@ -1,7 +1,7 @@
 use crate::{
     types::{
         audio_player::FullState,
-        config::{GuiConfig, HotkeyConfig},
+        config::{DaemonConfig, GuiConfig, HotkeyConfig},
         gui::AudioPlayerState,
         socket::{Request, Response},
     },
@@ -24,6 +24,19 @@ pub fn get_gui_config() -> GuiConfig {
     })
 }
 
+pub fn update_daemon_config(new_config: &DaemonConfig) -> Result<()> {
+    make_request_sync(Request::update_daemon_config(new_config))?;
+    make_request_async(Request::save_daemon_config());
+
+    Ok(())
+}
+
+pub fn get_daemon_config() -> Result<DaemonConfig> {
+    let response = make_request_sync(Request::get_daemon_config())?;
+    let config: DaemonConfig = serde_json::from_str(&response.message)?;
+    Ok(config)
+}
+
 pub fn make_request_sync(request: Request) -> Result<Response> {
     tokio::task::block_in_place(|| {
         tokio::runtime::Handle::current()