deps: update libvaxis (#9177)

Update libvaxis. The latest commit of libvaxis includes `uucode` as the
unicode
library. `uucode` has a much cleaner API and is actively developed by a
Ghostty
maintainer (@jacobsandlund). This also has the advantage of removing the
last
transitive dependency Ghostty has that is hosted on codeberg, which
separates us
from the frequent outages.


Disclosures: I used AI to debug the import issue in `boo.zig`

---------

Co-authored-by: Mitchell Hashimoto <m@mitchellh.com>

src/cli/boo.zig

@@ -6,7 +6,7 @@ const Allocator = std.mem.Allocator;
 const help_strings = @import("help_strings");
 const vaxis = @import("vaxis");
 
-const framedata = @embedFile("framedata");
+const framedata = @import("framedata").compressed;
 
 const vxfw = vaxis.vxfw;
 

src/cli/list_themes.zig

@@ -241,7 +241,7 @@ const Preview = struct {
             .hex = false,
             .mode = .normal,
             .color_scheme = .light,
-            .text_input = .init(allocator, &self.vx.unicode),
+            .text_input = .init(allocator),
             .theme_filter = theme_filter,
         };