Refactor GameMode and Players into skirmish_states

Move the GameMode and Players enums from the top‑level states module
into the
skirmish_states submodule, add an Unclaimed variant to Players, and
update all
imports, trait implementations, and related logic accordingly. Adjust
the
durability percentage calculation to use u32 for safety.

src/app/states/skirmish.rs

@@ -1,9 +1,4 @@
 use crate::app::states::skirmish_states::BoardState;
-use clap::ValueEnum;
-use ratatui::{
-    style::{Color, Stylize},
-    text::Span,
-};
 
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct SkirmishState {
@@ -12,38 +7,3 @@ pub struct SkirmishState {
     pub board: BoardState,
     pub side_panel: bool,
 }
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, ValueEnum)]
-pub enum GameMode {
-    LastManStanding,
-    FrontLines,
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum Players {
-    Player,
-    Enemy,
-}
-
-impl Players {
-    pub fn get_text(&self) -> &'static str {
-        match self {
-            Self::Player => "Player",
-            Self::Enemy => "Enemy",
-        }
-    }
-
-    pub fn get_color(&self) -> Color {
-        match self {
-            Self::Player => Color::LightBlue,
-            Self::Enemy => Color::LightRed,
-        }
-    }
-
-    pub fn get_span(&self) -> Span<'static> {
-        match self {
-            Self::Player => self.get_text().fg(self.get_color()),
-            Self::Enemy => self.get_text().fg(self.get_color()),
-        }
-    }
-}