xmake: migrate from NFD to tinyfiledialogs

nativefiledialog-extended works great on Linux w/ portal support, but somehow is
too complex to build on Windows. [1]
Switch to tinyfd for simplicity.

[1]: Visual Studio CL.exe would fail with MSB6001.

```
Error MSB6001: Invalid command line switch for "CL.exe". Item has already been added. Key in dictionary: 'VCInstallDir'  Key being added: 'VCINSTALLDIR'
```

For further information, see below:
https://social.msdn.microsoft.com/Forums/vstudio/en-US/5de6d7e3-7a38-4712-ba59-be179808bf9e/error-msb6001-invalid-command-line-switch-for-clexe
https://github.com/dotnet/msbuild/issues/5726

It's been over 10 years, and Microsoft still claims that case sensitivity thing is a FEATURE.
Holy M$, Thank you.

1 files changed, 4 insertions, 8 deletions

diff --git a/src/ui.c b/src/ui.c
index 7f1dc52..da6fd1b 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -5,7 +5,7 @@
 #include <string.h>
 
 #include "nuklear.h"
-#include <nfd.h>
+#include "tinyfiledialogs.h"
 
 #include "constants.h"
 #include "logger.h"
@@ -13,7 +13,7 @@
 #include "ui.h"
 
 static nk_size pct;
-static nfdchar_t *outPath;
+static char *outPath;
 
 void load_ui(struct ui_struct *ui) {
   static char text[USHRT_MAX], box_buffer[UINT16_MAX], status_string[UCHAR_MAX];
@@ -52,14 +52,10 @@ void load_ui(struct ui_struct *ui) {
     // Clear logger text
     clear_log();
 
-    nfdresult_t result = NFD_PickFolder(&outPath, "");
-    if (result == NFD_OKAY) {
-      DEBUG_PRINT("[NFD] outPath: %s\n", outPath);
-    } else if (result == NFD_ERROR) {
-      LOG("NFD", "Error: %s\n", NFD_GetError());
-    }
+    outPath = tinyfd_selectFolderDialog("Pick a download folder: ", NULL);
 
     if (outPath) {
+      DEBUG_PRINT("tinyfd gets outPath: %s\n", outPath);
       append_log("Got URL: %s\n", text);
       add_url(text, outPath, NULL, NULL);
     } else {