Refactor to Cargo Workspace (#129)

* Refactor project into a Cargo workspace with distinct packages

- Created a root `Cargo.toml` defining a workspace.
- Moved `src/types` and `src/utils` into a new `pwsp-lib` crate for shared logic.
- Split binaries into their own crates: `pwsp-daemon`, `pwsp-cli`, and `pwsp-gui`.
- Shifted all dependencies into `[workspace.dependencies]` for centralized version management.
- Updated import paths across all crates (e.g. from `pwsp::` to `pwsp_lib::`).
- Updated build scripts, GitHub actions, Flatpak manifest, and AUR PKGBUILD to support the new workspace structure.
- Ensured no core application logic was altered.

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* Fix cargo-deb build process in GitHub actions for workspace architecture

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* Fix cargo-deb asset discovery by using exact target/release paths

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* refactor deps in Cargo.toml files

* fix incorrect assets path

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

pwsp-gui/src/gui/views/hotkey_capture.rs

@@ -0,0 +1,32 @@
+use crate::gui::SoundpadGui;
+use egui::{Color32, RichText, Ui};
+use rust_i18n::t;
+
+impl SoundpadGui {
+    pub fn draw_hotkey_capture(&mut self, ui: &mut Ui) {
+        ui.vertical_centered(|ui| {
+            ui.add_space(ui.available_height() / 3.0);
+            ui.label(
+                RichText::new(t!("gui.hotkeys.capture.header"))
+                    .size(18.0)
+                    .color(Color32::YELLOW)
+                    .monospace(),
+            );
+            ui.add_space(10.0);
+            let target = if let Some(slot) = &self.app_state.assigning_hotkey_slot {
+                format!("{} '{}'", t!("gui.hotkeys.capture.for"), slot)
+            } else if let Some(path) = &self.app_state.assigning_hotkey_for_file {
+                format!(
+                    "{} '{}'",
+                    t!("gui.hotkeys.capture.for"),
+                    path.file_name().unwrap_or_default().to_string_lossy()
+                )
+            } else {
+                String::new()
+            };
+            ui.label(RichText::new(target).size(16.0));
+            ui.add_space(10.0);
+            ui.label(t!("gui.hotkeys.capture.cancel"));
+        });
+    }
+}