Three new heroes: giant, fairy spy, battle mage

- giant (from wave 6): slow and enormous, smashes doors three times as hard and wrecks traps by standing next to them
- fairy spy (from wave 3): flies, finds the dungeon's traps (marked with a glint) so the heroes wreck them, and heals heroes around it
- battle mage (from wave 4): throws fireballs with splash and blasts reinforced walls (steel resists him better)
- sprites, bestiary texts EN/DE, test: fairies find traps, giants wreck them

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/gfx.rs

@@ -1278,6 +1278,45 @@ fn sprite_rows(k: EK) -> [&'static str; 10] {
             "..kCk.kCk.",
             "..kk...kk.",
         ],
+        // giant: a huge brute in a leather jerkin with a tree-trunk club
+        EK::Giant => [
+            "...kkkk...",
+            "..kffffk..",
+            "..kfefek.b",
+            "..kffffk.b",
+            ".kBBBBBBkb",
+            "kfBuuuuBfb",
+            "kfBuuuuBf.",
+            ".kBBBBBBk.",
+            ".kBBk.kBBk",
+            ".kkk...kkk",
+        ],
+        // fairy: a tiny glowing spy with dragonfly wings
+        EK::Fairy => [
+            "..........",
+            "ww.....ww.",
+            "www.kk.www",
+            ".wwkffkww.",
+            "..wkefkw..",
+            "...kuuk...",
+            "...kuuk...",
+            "....kk....",
+            "...y..y...",
+            "..........",
+        ],
+        // battle mage: robes of the order, a burning staff
+        EK::BattleMage => [
+            "....kk...o",
+            "...kuuk.oy",
+            "..kuuuuk.o",
+            ".kkffffk.b",
+            "..kfefek.b",
+            "..kwuuwk.b",
+            ".kuwuuwukb",
+            ".kuuwwuuk.",
+            ".kuuuuuuk.",
+            "..kkkkkk..",
+        ],
         EK::Wyrm => [
             "R.......kw",
             "RR....krrk",
@@ -1347,7 +1386,7 @@ fn pal(ch: char) -> Option<Color> {
     })
 }
 
-pub const SPRITE_KINDS: [EK; 19] = [
+pub const SPRITE_KINDS: [EK; 22] = [
     EK::Worker,
     EK::Kobold,
     EK::Spider,
@@ -1367,6 +1406,9 @@ pub const SPRITE_KINDS: [EK; 19] = [
     EK::Wyrm,
     EK::Cogling,
     EK::Revenant,
+    EK::Giant,
+    EK::Fairy,
+    EK::BattleMage,
 ];
 // width of the sprite texture in pixels
 pub const SPRITE_TEX_W: f32 = (SPRITE_KINDS.len() * 12) as f32;
@@ -1384,7 +1426,7 @@ pub fn gear_tier(level: u32) -> u32 {
 }
 
 fn is_hero_kind(k: EK) -> bool {
-    matches!(k, EK::Knight | EK::Archer | EK::Priest | EK::Dwarf | EK::Paladin)
+    matches!(k, EK::Knight | EK::Archer | EK::Priest | EK::Dwarf | EK::Paladin | EK::Giant | EK::Fairy | EK::BattleMage)
 }
 
 // Views of a sprite for eight directions (the others are mirrored): 0 front, 1 front