slightly improve logs (#8767)

Hello

This is a small thing I noticed when building Ghostty. The logs for
SetTitle and Pwd are unreadable due to them being shown as an array of
integers, so I added a custom formatter for them to be shows as text.

src/apprt/action.zig

@@ -569,6 +569,15 @@ pub const SetTitle = struct {
             .title = self.title.ptr,
         };
     }
+
+    pub fn format(
+        value: @This(),
+        comptime _: []const u8,
+        _: std.fmt.FormatOptions,
+        writer: anytype,
+    ) !void {
+        try writer.print("{s}{{ {s} }}", .{ @typeName(@This()), value.title });
+    }
 };
 
 pub const Pwd = struct {
@@ -584,6 +593,15 @@ pub const Pwd = struct {
             .pwd = self.pwd.ptr,
         };
     }
+
+    pub fn format(
+        value: @This(),
+        comptime _: []const u8,
+        _: std.fmt.FormatOptions,
+        writer: anytype,
+    ) !void {
+        try writer.print("{s}{{ {s} }}", .{ @typeName(@This()), value.pwd });
+    }
 };
 
 /// The desktop notification to show.
@@ -603,6 +621,19 @@ pub const DesktopNotification = struct {
             .body = self.body.ptr,
         };
     }
+
+    pub fn format(
+        value: @This(),
+        comptime _: []const u8,
+        _: std.fmt.FormatOptions,
+        writer: anytype,
+    ) !void {
+        try writer.print("{s}{{ title: {s}, body: {s} }}", .{
+            @typeName(@This()),
+            value.title,
+            value.body,
+        });
+    }
 };
 
 pub const KeySequence = union(enum) {