Scaffold sporel-module-map-editor package

Empty launchable module with deps on lib-core.maps 0.4.0, render,
camera, input, and the fa_terrain_v1 asset alias. Renders the
default 4x4 empty work-map; interactive editing wired in
subsequent commits.

init.lua

@@ -0,0 +1,18 @@
+-- sporel-module-map-editor v0.1.0
+-- Interactive map editor; full wiring lands in subsequent commits.
+
+local maps = require("lib-core.maps")
+
+local work_map_id = maps.load("maps/work.map.json")
+maps.set_current(work_map_id)
+maps.load_textures(engine.module.asset_aliases())
+
+engine.print("map-editor: scaffold loaded, map_id=" .. work_map_id)
+
+function update(ctx, dt)
+    -- TODO: wired in later commits
+end
+
+function draw()
+    maps.draw_map()
+end