Migrate to Zig 0.16.0 and bump vittest to 4.1.5

[yeongjukang]

Hello, thank you for creating this package. I updated code to support Zig 0.16.0.

Changes

• build.zig
  • addRemoveDirTree was removed with no direct replacement in the build system API
  • addSystemCommand with platform-appropriate
    rm/rmdir
• build.zig.zon
  • bump minimum_zig_version to 0.16.0
• pty_linux.zig
  • std.fs.openDirAbsolute was removed so replaced
    it with raw linux.open and linux.getdents64
    syscalls
  • std.fs.openFileAbsolute and std.posix.readlink
    replaced with raw linux syscalls
  • bufPrint --> bufPrintZ for null-terminated paths
    required by raw syscalls
  • linux.E.init() --> linux.errno()
  • use .empty to initialize ArrayListUnmanaged
• pty_darwin.zig
  • use .empty to initialize ArrayListUnmanaged
  • @intFromEnum/@enumFromInt to handle SIG
    constants in resetSignalHandlers
• pty_windows.zig
  • use .empty to initialize ArrayListUnmanaged
  • Windows BOOL comparisons use .toBool()
  • OpenProcess second arg: 0 --> .FALSE
  • windows.HRESULT to local i32 alias
• vitest
  • 4.1.3 to 4.1.5

---

zigpty [main●] % bun run test
$ zig build test && vitest run

 RUN  v4.1.5 /Users/yeongju/zigpty

 ✓ src/terminal.test.ts (17 tests) 898ms
 ✓ src/spawn.test.ts (30 tests | 1 skipped) 2764ms
     ✓ should intercept default XOFF/XON when handleFlowControl is true  512ms
     ✓ should not intercept flow control when disabled  312ms
     ✓ should stop receiving data after dispose  611ms
 ✓ src/pipe.test.ts (40 tests | 2 skipped) 4115ms
     ✓ should stop receiving data after dispose  721ms

 Test Files  3 passed (3)
      Tests  84 passed | 3 skipped (87)
   Start at  14:33:40
   Duration  4.32s (transform 152ms, setup 0ms, import 222ms, tests 7.78s, environment 0ms)