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.

README.md

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+# sporel-module-map-editor
+
+Interactive map editor module for v2 Sporel maps. Click-to-paint, vertical layer-chip overlay, collapsible atlas+tile picker.
+
+## Status
+
+`v0.1.0` — initial POC. See `docs/superpowers/specs/2026-05-23-sporel-module-map-editor-design.md` in `sporel-meta` for the full spec.
+
+## Run
+
+```bash
+bash scripts/run-map-editor.sh [target_map.json]
+```
+
+(Detailed hotkey reference and UI walkthrough added in a later commit.)

init.lua

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+-- 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

manifest.module

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+{
+    "id": "sporel-module-map-editor",
+    "version": "0.1.0",
+    "kind": "module",
+    "api": "^0.1",
+    "ci_frames": 30,
+    "entry_point": "init.lua",
+    "asset_aliases": {
+        "fa_terrain_v1": "lib-asset.prototype-fa-starter"
+    },
+    "deps": [
+        {"id":"lib-core.maps","version":"0.4.0"},
+        {"id":"lib-core.render","version":"0.1.0"},
+        {"id":"lib-core.camera","version":"0.3.0"},
+        {"id":"lib-core.input","version":"0.4.0"},
+        {"id":"lib-asset.prototype-fa-starter","version":"0.2.0"}
+    ]
+}

maps/work.map.json

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+{
+  "schema_version": 2,
+  "id": "work",
+  "size": { "w": 4, "h": 4 },
+  "atlases": ["fa_terrain_v1"],
+  "layers": {
+    "surface": {
+      "tiles": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    }
+  }
+}