chore: cargo fmt across workspace; add analytics domain to CSP

- Apply cargo fmt to solitaire_engine, solitaire_server formatting.
- solitaire_server/src/lib.rs: add https://analytics.aleshym.co to
  script-src, img-src, and connect-src so the analytics beacon loads
  without a CSP violation.
- docs and README updates.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

solitaire_engine/src/replay_overlay/update.rs

@@ -1,10 +1,10 @@
 use bevy::prelude::*;
 
-use super::*;
 use super::format::{
-    format_active_move_row, format_foundations_row, format_kth_next_row,
-    format_kth_recent_row, format_move_log_header, format_progress, format_stock_waste_row,
+    format_active_move_row, format_foundations_row, format_kth_next_row, format_kth_recent_row,
+    format_move_log_header, format_progress, format_stock_waste_row,
 };
+use super::*;
 use crate::layout::LayoutResource;
 use crate::replay_playback::ReplayPlaybackState;
 use crate::resources::GameStateResource;