feat: add scramble flag for development text scrambling

This commit introduces a new scramble option to help reduce distractions
during development by scrambling text using rot13. When enabled via the
new `--scramble` flag, text displayed in various views is transformed,
making it easier to focus on layout and behavior without reading the
actual content.

App & Args Updates

  - Added a `scramble: bool` field to the main application state (in `app.rs`).

  - Extended argument parsing (in `args.rs`) to recognize the `--scramble` flag.

NoteOptions Enhancement

  - Introduced a new bit flag `scramble_text` in `NoteOptions` with
    corresponding setter/getter methods.

UI Adjustments

  - Propagated the scramble flag through note rendering functions across
    navigation, timeline, and note view modules.

  - Updated several UI components (e.g., in `nav.rs`, `route.rs`, and
    `contents.rs`) to accept and apply the new note options.

Rot13 Implementation

  - Implemented a helper function (`rot13`) to scramble text
    conditionally when the scramble option is enabled.

This feature is intended for development builds only, offering a way to
obscure text content during UI tweaks and testing.

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

crates/notedeck_columns/src/ui/note/reply_description.rs

@@ -1,4 +1,7 @@
-use crate::{actionbar::NoteAction, ui};
+use crate::{
+    actionbar::NoteAction,
+    ui::{self, note::NoteOptions},
+};
 use egui::{Label, RichText, Sense};
 use nostrdb::{Ndb, Note, NoteReply, Transaction};
 use notedeck::{ImageCache, NoteCache};
@@ -11,6 +14,7 @@ pub fn reply_desc(
     ndb: &Ndb,
     img_cache: &mut ImageCache,
     note_cache: &mut NoteCache,
+    note_options: NoteOptions,
 ) -> Option<NoteAction> {
     #[cfg(feature = "profiling")]
     puffin::profile_function!();
@@ -41,7 +45,7 @@ pub fn reply_desc(
         if r.hovered() {
             r.on_hover_ui_at_pointer(|ui| {
                 ui.set_max_width(400.0);
-                ui::NoteView::new(ndb, note_cache, img_cache, note)
+                ui::NoteView::new(ndb, note_cache, img_cache, note, note_options)
                     .actionbar(false)
                     .wide(true)
                     .show(ui);