migrate from std::filesystem::path to io::path (WIP)

test/coders/lua_parsing.cpp

@@ -7,7 +7,7 @@
 
 TEST(lua_parsing, Tokenizer) {
     auto filename = "../../res/scripts/stdlib.lua";
-    auto source = io::read_string(std::filesystem::u8path(filename));
+    auto source = io::read_string(filename);
     try {
         auto tokens = lua::tokenize(filename, source);
         for (const auto& token : tokens) {

test/coders/vec3.cpp

@@ -4,9 +4,7 @@
 #include "io/io.hpp"
 
 TEST(VEC3, Decode) {
-    auto file = std::filesystem::u8path(
-        "res/models/block.vec3"
-    );
+    io::path file = "res/models/block.vec3";
     auto bytes = io::read_bytes_buffer(file);
-    auto model = vec3::load(file.u8string(), bytes);
+    auto model = vec3::load(file.string(), bytes);
 }

test/io/path.cpp

@@ -0,0 +1,14 @@
+#include <gtest/gtest.h>
+
+#include "io/path.hpp"
+
+TEST(Path, Path) {
+    io::path p("entry_point:path/file.ext");
+    EXPECT_EQ(p, "entry_point:path/file.ext");
+    EXPECT_EQ(p.pathPart(), "path/file.ext");
+    EXPECT_EQ(p.name(), "file.ext");
+    EXPECT_EQ(p.extension(), ".ext");
+    EXPECT_EQ(p.entryPoint(), "entry_point");
+    EXPECT_EQ(p / "child", "entry_point:path/file.ext/child");
+    EXPECT_EQ(p.parent(), "entry_point:path");
+}