refactor: Split large draw.rs into modular views (#113)

Replaced the monolithic `src/gui/draw.rs` with a new `src/gui/views` directory module.
The GUI drawing logic is now cleanly separated into distinct files:
- `body.rs`
- `footer.rs`
- `header.rs`
- `hotkey_capture.rs`
- `hotkeys.rs`
- `settings.rs`
- `waiting_for_daemon.rs`

This organization vastly improves readability and maintainability without altering functionality. All shared helpers are centralized in `src/gui/views/mod.rs` and imports are strictly managed.

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

src/gui/views/waiting_for_daemon.rs

@@ -0,0 +1,14 @@
+use crate::gui::SoundpadGui;
+use egui::{RichText, Ui};
+
+impl SoundpadGui {
+    pub fn draw_waiting_for_daemon(&mut self, ui: &mut Ui) {
+        ui.centered_and_justified(|ui| {
+            ui.label(
+                RichText::new("Waiting for PWSP daemon to start...")
+                    .size(34.0)
+                    .monospace(),
+            );
+        });
+    }
+}