cli: list-themes should list symlinks

Symbolic links should be listed in addition to normal files. Useful
for system like home-manager that link config files to location in the
Nix store.

src/cli/list_themes.zig

@@ -114,13 +114,17 @@ pub fn run(gpa_alloc: std.mem.Allocator) !u8 {
         var walker = dir.iterate();
 
         while (try walker.next()) |entry| {
-            if (entry.kind != .file) continue;
+            switch (entry.kind) {
+                .file, .sym_link => {
                     count += 1;
                     try themes.append(.{
                         .location = loc.location,
                         .path = try std.fs.path.join(alloc, &.{ loc.dir, entry.name }),
                         .theme = try alloc.dupe(u8, entry.name),
                     });
+                },
+                else => {},
+            }
         }
     }