windows: add support for the glfw backend on Windows

Changes:
- Add WindowsPty, which uses the ConPTY API to create a pseudo console
- Pty now selects between PosixPty and WindowsPty
- Windows support in Command, including the ability to launch a process with a pseudo console
- Enable Command tests on windows
- Add some environment variable abstractions to handle the missing libc APIs on Windows
- Windows version of ReadThread

build.zig.zon

@@ -5,8 +5,8 @@
     .dependencies = .{
         // Zig libs
         .libxev = .{
-            .url = "https://github.com/mitchellh/libxev/archive/5ecbc871f3bfa80fb7bf0fa853866cb93b99bc18.tar.gz",
-            .hash = "1220416854e424601ecc9814afb461a5dc9cf95db5917d82f794594a58ffc723b82c",
+            .url = "https://github.com/kcbanner/libxev/archive/d71ddeb19c6697875c2e0e68a49d04c05bc26199.tar.gz",
+            .hash = "1220a26265c30f5677ce28daf04afbd7a6ef5a17f5d3b5506f767fdfee7dc4225d2b",
         },
         .mach_glfw = .{
             .url = "https://github.com/hexops/mach-glfw/archive/16dc95cc7f74ebbbdd848d9a2c3cc4afc5717708.tar.gz",

src/App.zig

@@ -61,11 +61,8 @@ pub fn create(
 
     // Find our resources directory once for the app so every launch
     // hereafter can use this cached value.
-    var resources_buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
-    const resources_dir = if (try internal_os.resourcesDir(&resources_buf)) |dir|
-        try alloc.dupe(u8, dir)
-    else
-        null;
+    const resources_dir = try internal_os.resourcesDir(alloc);
+    errdefer if (resources_dir) |dir| alloc.free(dir);
 
     app.* = .{
         .alloc = alloc,