feat: enhance physics and map modules with Box2D integration and documentation updates

- Updated the physics module to include Box2D support, enabling management of physics bodies and collision events.
- Enhanced the map module to support tile layers and improved hot-reload functionality for tilemaps.
- Updated documentation to reflect the new features in the physics and map systems, including usage examples and API references.
- Modified CMakeLists.txt to include new modules for physics and font management, ensuring proper build configurations.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/map.cpp

@@ -0,0 +1,106 @@
+#include "zeroerr/assert.h"
+#include "zeroerr/unittest.h"
+
+#include "map/Map.h"
+#include "map/TileLayer.h"
+#include "map/TileSystem.h"
+#include "map/TileConfig.h"
+
+#include <string>
+
+using namespace eve::map;
+
+TEST_CASE("map.newLayer.ecsView") {
+    auto *mod = Map::create();
+    int before = mod->getLayerCount();
+    TileLayer *layer = mod->newLayer(4, 3, 16.f, 16.f);
+    REQUIRE(layer != nullptr);
+    CHECK_EQ(layer->getMapWidth(), 4);
+    CHECK_EQ(layer->getMapHeight(), 3);
+    CHECK_EQ(layer->getTileWidth(), 16.f);
+    CHECK_EQ(layer->getTileHeight(), 16.f);
+    CHECK_EQ(mod->getLayerCount(), before + 1);
+    CHECK(layer->config()->entity == layer);
+}
+
+TEST_CASE("map.layer.setGetTile") {
+    auto *mod = Map::create();
+    TileLayer *layer = mod->newLayer(3, 2, 32.f, 32.f);
+    CHECK_EQ(layer->getTile(0, 0), 0);
+    layer->setTile(1, 1, 5);
+    CHECK_EQ(layer->getTile(1, 1), 5);
+    layer->setTile(-1, 0, 9);  // out of range no-op
+    CHECK_EQ(layer->getTile(0, 0), 0);
+    layer->fill(7);
+    CHECK_EQ(layer->getTile(0, 0), 7);
+    CHECK_EQ(layer->getTile(2, 1), 7);
+    layer->clear();
+    CHECK_EQ(layer->getTile(1, 0), 0);
+}
+
+TEST_CASE("map.layer.resizeClears") {
+    auto *mod = Map::create();
+    TileLayer *layer = mod->newLayer(2, 2, 8.f, 8.f);
+    layer->setTile(0, 0, 3);
+    layer->resize(4, 1);
+    CHECK_EQ(layer->getMapWidth(), 4);
+    CHECK_EQ(layer->getMapHeight(), 1);
+    CHECK_EQ(layer->getTile(0, 0), 0);
+}
+
+TEST_CASE("map.layer.applyConfigFlat") {
+    auto *mod = Map::create();
+    TileLayer *layer = mod->newLayer(2, 2, 16.f, 16.f);
+    const char *json = R"({
+        "width": 2,
+        "height": 2,
+        "tilewidth": 16,
+        "tileheight": 16,
+        "data": [1, 2, 3, 4],
+        "origin": [10, 20],
+        "layer": 2,
+        "visible": true,
+        "tint": [1, 0.5, 0.25, 1]
+    })";
+    CHECK(layer->applyConfig(json));
+    CHECK_EQ(layer->getTile(0, 0), 1);
+    CHECK_EQ(layer->getTile(1, 0), 2);
+    CHECK_EQ(layer->getTile(0, 1), 3);
+    CHECK_EQ(layer->getTile(1, 1), 4);
+    CHECK_EQ(layer->getX(), 10.f);
+    CHECK_EQ(layer->getY(), 20.f);
+    CHECK_EQ(layer->getLayer(), 2);
+    CHECK(layer->isVisible());
+}
+
+TEST_CASE("map.layer.applyConfigMultiLayerPicksFirst") {
+    auto *mod = Map::create();
+    TileLayer *layer = mod->newLayer(2, 1, 8.f, 8.f);
+    const char *json = R"({
+        "width": 2,
+        "height": 1,
+        "tilewidth": 8,
+        "tileheight": 8,
+        "layers": [
+            { "type": "tilelayer", "width": 2, "height": 1, "data": [9, 8] },
+            { "type": "objectgroup", "objects": [] },
+            { "type": "tilelayer", "width": 2, "height": 1, "data": [1, 1] }
+        ]
+    })";
+    CHECK(layer->applyConfig(json));
+    CHECK_EQ(layer->getTile(0, 0), 9);
+    CHECK_EQ(layer->getTile(1, 0), 8);
+}
+
+TEST_CASE("map.tileGid.masksFlipFlags") {
+    CHECK_EQ(tileGid(0), 0u);
+    CHECK_EQ(tileGid(5), 5u);
+    CHECK_EQ(tileGid(0x80000005u), 5u);
+}
+
+TEST_CASE("map.render.nullSafe") {
+    auto *mod = Map::create();
+    TileLayer *layer = mod->newLayer(2, 2, 8.f, 8.f);
+    layer->fill(1);
+    TileRenderSystem::render(nullptr);
+}