refactor: rename widgets to ui

consolidate ui related things like widgets into our ui module

Signed-off-by: William Casarin <jb55@jb55.com>

src/ui/mod.rs

@@ -0,0 +1,17 @@
+pub mod note;
+pub mod username;
+
+pub use note::Note;
+pub use username::Username;
+
+use egui::Margin;
+
+pub fn padding<R>(
+    amount: impl Into<Margin>,
+    ui: &mut egui::Ui,
+    add_contents: impl FnOnce(&mut egui::Ui) -> R,
+) -> egui::InnerResponse<R> {
+    egui::Frame::none()
+        .inner_margin(amount)
+        .show(ui, add_contents)
+}