mitchell's touchups

- benchmark: avoid buffers to avoid a memcpy
- build: keep frame pointers on macOS. There was some debug changes from
  Zig 0.15 and this helps. Also, Apple actually requires/expects x29 to
  always be a frame pointer.
- build/macos: force libSystem symbols instead of compiler-rt
- global: add InitOpts.tool so that ghostty-gen/bench can parse their
  own actions in `+action`
- quirks: provide our own vectorized memset. see the comment for more
  details why.
- synthetic: fix UB by accessing global.io before it was initialized
- terminal/hash_map: force inline for unique repr types. Zig 0.15
  inlined and 0.16 doesn't, measured a huge slowdown in hyperlink
  benchmarks.
- terminal: add explicit `@Vector` usage for storing a run of identical cells
  as well as for scanning printable cells. This auto-vectorized in Zig
  0.15 but not in Zig 0.16. This produces the same assembly.
- unicode: properties and LUT need power-of-two backing integer to avoid
  bad LLVM codegen

pkg/dcimgui/build.zig.zon

@@ -15,7 +15,7 @@
 
         .imgui = .{
             // https://github.com/ocornut/imgui
-            .url = "https://github.com/ocornut/imgui/archive/refs/tags/v1.92.5-docking.tar.gz",
+            .url = "https://deps.files.ghostty.org/N-V-__8AAEbOfQBnvcFcCX2W5z7tDaN8vaNZGamEQtNOe0UI.tar.gz",
             .hash = "N-V-__8AAEbOfQBnvcFcCX2W5z7tDaN8vaNZGamEQtNOe0UI",
             .lazy = true,
         },

pkg/gtk4-layer-shell/build.zig.zon

@@ -15,7 +15,7 @@
             .lazy = true,
         },
         .translate_c = .{
-            .url = "https://codeberg.org/vancluever/translate-c/archive/a916baf225a3cfc93a982225462db612604ae290.tar.gz",
+            .url = "https://deps.files.ghostty.org/translate_c-a916baf225a3cfc93a982225462db612604ae290.tar.gz",
             .hash = "translate_c-0.0.0-Q_BUWj8_BwCr4na219OimiKKj4IVSq0aKtMXCQmIk4AB",
             .lazy = true,
         },

pkg/harfbuzz/build.zig.zon

@@ -5,7 +5,7 @@
     .paths = .{""},
     .dependencies = .{
         .translate_c = .{
-            .url = "https://codeberg.org/vancluever/translate-c/archive/a916baf225a3cfc93a982225462db612604ae290.tar.gz",
+            .url = "https://deps.files.ghostty.org/translate_c-a916baf225a3cfc93a982225462db612604ae290.tar.gz",
             .hash = "translate_c-0.0.0-Q_BUWj8_BwCr4na219OimiKKj4IVSq0aKtMXCQmIk4AB",
             .lazy = true,
         },

pkg/macos/build.zig.zon

@@ -6,7 +6,7 @@
     .dependencies = .{
         .apple_sdk = .{ .path = "../apple-sdk" },
         .translate_c = .{
-            .url = "https://codeberg.org/vancluever/translate-c/archive/a916baf225a3cfc93a982225462db612604ae290.tar.gz",
+            .url = "https://deps.files.ghostty.org/translate_c-a916baf225a3cfc93a982225462db612604ae290.tar.gz",
             .hash = "translate_c-0.0.0-Q_BUWj8_BwCr4na219OimiKKj4IVSq0aKtMXCQmIk4AB",
             .lazy = true,
         },

pkg/wuffs/build.zig.zon

@@ -5,7 +5,7 @@
     .dependencies = .{
         .translate_c = .{
             .lazy = true,
-            .url = "https://codeberg.org/vancluever/translate-c/archive/a916baf225a3cfc93a982225462db612604ae290.tar.gz",
+            .url = "https://deps.files.ghostty.org/translate_c-a916baf225a3cfc93a982225462db612604ae290.tar.gz",
             .hash = "translate_c-0.0.0-Q_BUWj8_BwCr4na219OimiKKj4IVSq0aKtMXCQmIk4AB",
         },