RPG world mod: tile maps, grid walking, map events, battles

Maps of square tiles in three layers plus a collision layer, mounted over
the 2D shell when their scene is entered. WASD walking, E/F action events,
touch teleports, story-flag conditions, random encounters, rpg.battle and
rpg.teleport actions, position saving. Integration suite rpg_walk.

test_suites/walk/manifest.json

@@ -0,0 +1,10 @@
+{
+  "name": "RPG Walk Test",
+  "description": "Integration test of the rpg mod on the rpg_demo game: real WASD/E key events walk the hero, collide, read a sign, turn an NPC, go through a door teleport, flip events by a story flag, fight a battle that returns to the same cell with the win flag set. Activated by --itest=rpg_walk with --game=rpg_demo --new; --shots=<dir> saves screenshots (windowed runs only).",
+  "sources": [
+    "src/*.cs"
+  ],
+  "depends": [
+    "rpg_demo_game>=1"
+  ]
+}