Five new rooms: prison, graveyard, guard post, arena, sacrifice altar; new creature: the revenant

- prison: captured heroes sit in cells apart from the torture chamber, do not defect and starve in time; the hand can move prisoners between cells and torture
- graveyard: the fallen are buried there; after a while some rise as revenants (undead: no food, no sleep, life drain from level 5)
- guard post: creatures hold the position and attack whatever comes into view
- arena: creatures spar in pairs for fast, free experience, at the cost of bruises
- sacrifice altar: creatures dropped on it are sacrificed; certain pairs bring a rare creature, otherwise a blessing (mood and mana)
- researched in the library, campaign unlocks, textures, furniture, texts EN/DE, bestiary

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

src/map.rs

@@ -63,6 +63,11 @@ pub enum Kind {
     RuneChest,  // dwarven chest with the plans of a rune forge tower (claim it: one free build)
     Forge,      // room: creatures manufacture traps and doors
     Door,       // floor with an installed door (res bit 0: locked)
+    Prison,     // room: prisoners wait in cells
+    Graveyard,  // room: the fallen are buried, some rise again
+    GuardPost,  // room: creatures hold the position
+    Arena,      // room: sparring
+    Altar,      // room: sacrifices
 }
 
 // options for the map generator (campaign missions)
@@ -91,7 +96,7 @@ pub struct River {
 }
 
 // order matters for the packed savegame codec: only append new kinds
-const KINDS: [Kind; 29] = [
+const KINDS: [Kind; 34] = [
     Kind::Rock,
     Kind::Earth,
     Kind::Gold,
@@ -121,6 +126,11 @@ const KINDS: [Kind; 29] = [
     Kind::RuneChest,
     Kind::Forge,
     Kind::Door,
+    Kind::Prison,
+    Kind::Graveyard,
+    Kind::GuardPost,
+    Kind::Arena,
+    Kind::Altar,
 ];
 
 // treasures (veins, treasury content, imp loads): 0 gold, 1 silver, 2 ruby, 3 diamond
@@ -219,6 +229,11 @@ impl Tile {
                 | Kind::RuneChest
                 | Kind::Forge
                 | Kind::Door
+                | Kind::Prison
+                | Kind::Graveyard
+                | Kind::GuardPost
+                | Kind::Arena
+                | Kind::Altar
         )
     }
     // river tiles (open, but nobody can walk there)