feat: v0.1.2 sprite-mode in draw_map + tile_rotations + load_textures

Sprite-mode in draw_map:
- tilemap-tiles with texture atlas-id render via
  engine.render.draw_sprite_transform with rotation pivot at tile center
- tiles without texture continue to render via draw_rect with color
  (Phase 1 mode preserved)

Tile rotation:
- maps support an optional tile_rotations parallel array in the map
  JSON with per-cell 90-degree rotation values (0/90/180/270)
- absent or nil entries default to 0 (no rotation)
- enables 9-segment tile reuse via rotation rather than per-orientation
  sprites

New API:
- maps.load_textures(asset_aliases) resolves the current tilemap's
  tile atlas-ids to texture-handles via the asset-lib indirection
  (asset_aliases[tilemap.asset_pack] -> lib-id -> atlas.json lookup
  per tile)

Schema additions:
- tilemap.asset_pack (alias-key, optional)
- tile.texture (atlas-id, optional)
- map.tile_rotations (parallel array, optional)

All existing Phase 1 color-only tilemaps render unchanged.

README.md

@@ -2,7 +2,7 @@
 
 Single tile-grid map implementation. Loads JSON map + tilemap files, registers maps by id, and provides tile-fetch + walkability + size queries with current-map sugar.
 
-**Version:** 0.1.1  
+**Version:** 0.1.2  
 **Lib-ID:** lib-core.maps  
 **Requires:** (none)  
 **Tags:** maps, tile-grid, walkability, tilemap
@@ -93,6 +93,22 @@ if tile then engine.print(tile.id) end
 
 **Description:** Returns an array of all registered map-ids.
 
+### `maps.load_textures(asset_aliases)`
+**Syntax:** `maps.load_textures(asset_aliases: {[string]: string}) -> void`
+
+**Example:**
+```lua
+maps.set_current(map_id)
+maps.load_textures({ terrain = "lib-core.terrain-assets" })
+```
+
+**Description:** Resolves the current tilemap's tile `texture` atlas-ids to texture-handles via the asset-lib indirection. `asset_aliases` maps the tilemap's `asset_pack` alias-key to a lib-id; the lib's `assets/atlas.json` is read to locate each texture file. Populates `tile.texture_handle` on each tile in-place. No-op if the tilemap has no `asset_pack`. Call once at module init after `set_current`; do not call repeatedly (texture handles are not auto-cached).
+
+### `maps.draw_map()`
+**Syntax:** `maps.draw_map() -> void`
+
+**Description:** Draws the current map grid. Tiles with a resolved `texture_handle` render via `engine.render.draw_sprite_transform` with rotation about the tile center (using the map's optional `tile_rotations` parallel array). Tiles without a texture handle fall back to `engine.render.draw_rect` with `tile.color` (Phase 1 mode). No-op if no current map.
+
 ### `maps.state(map_id)`
 **Syntax:** `maps.state(map_id: string) -> string`
 
@@ -130,6 +146,21 @@ end
 
 ## CHANGELOG
 
+### v0.1.2
+- Sprite-mode in draw_map: tilemap-tiles with `texture` atlas-id render
+  via engine.render.draw_sprite_transform; tiles without `texture` fall
+  back to color-rect render (Phase 1 mode).
+- Map-data tile_rotations parallel array support: per-cell 90-degree
+  rotation in {0, 90, 180, 270}, applied at draw via rotation about
+  the tile center. Optional; absent means all-zero.
+- New API: maps.load_textures(asset_aliases) resolves the current
+  tilemap's tile atlas-ids to texture-handles via the asset-lib
+  indirection. Mirrors the puppet.load_textures pattern.
+- Tilemap schema additions: tilemap.asset_pack (alias-key),
+  tile.texture (atlas-id).
+- Backward-compat: existing Phase 1 color-only tilemaps render
+  unchanged.
+
 ### v0.1.1
 - Tilemap-id resolution handles module-ids with dots (prefix-match instead of first-dot split).