don't crash on htab, but its not implemented yet

src/terminal/Terminal.zig

@@ -133,6 +133,7 @@ fn execute(self: *Terminal, c: u8) !void {
     switch (@intToEnum(ansi.C0, c)) {
         .BEL => self.bell(),
         .BS => self.backspace(),
+        .HT => self.horizontal_tab(),
         .LF => self.linefeed(),
         .CR => self.carriage_return(),
     }
@@ -149,6 +150,11 @@ pub fn backspace(self: *Terminal) void {
     self.cursor.x -|= 1;
 }
 
+/// TODO
+pub fn horizontal_tab(self: *Terminal) void {
+    _ = self;
+}
+
 /// Carriage return moves the cursor to the first column.
 pub fn carriage_return(self: *Terminal) void {
     self.cursor.x = 0;

src/terminal/ansi.zig

@@ -7,6 +7,8 @@ pub const C0 = enum(u7) {
     BEL = 0x07,
     /// Backspace
     BS = 0x08,
+    // Horizontal tab
+    HT = 0x09,
     /// Line feed
     LF = 0x0A,
     /// Carriage return