fix github workflows

[YesDrX]

Mostly change from "jiro4989/setup-nim-action@v1" to "jiro4989/setup-nim-action@v2'. Also, "nimble install c2nim -y".

I tried to upgrade webui submodule to nightly, but it won't compile as the c library is missing implemenation for _win32_wv2_set_stop under windows and some other similar function in macos.

Actions results:
https://github.com/YesDrX/nim-webui/actions/runs/20046752333

@AlbertShown pls review

[AlbertShown]

c library is missing implemenation for _win32_wv2_set_stop under windows

It's not missing, but it gets removed from the C library, if _win32_wv2_set_stop is not in the C library, then it should be removed from Nim wrapper.

[YesDrX]

c library is missing implemenation for _win32_wv2_set_stop under windows

It's not missing, but it gets removed from the C library, if _win32_wv2_set_stop is not in the C library, then it should be removed from Nim wrapper.

Hmm, but I still see the following in nightly branch. Nim essentially compiles webui.c together with other transpiled c files. If webui.c still references _webui_win32_wv2_set_url, _webui_win32_wv2_set_stop, linker will fail. Did you try the c lib under windows? I don't see any results in https://github.com/webui-dev/webui/actions/workflows/windows.yml yet.

        #ifdef _WIN32
        if (win->webView->cpp_handle) {
            wchar_t* wURL = NULL;
            _webui_str_to_wide(url, &wURL);
            _webui_win32_wv2_set_url(win->webView->cpp_handle, wURL);
            _webui_win32_wv2_set_navigate_flag(win->webView->cpp_handle, true);
            _webui_webview_update(win);
        }
        #else
        _webui_free_mem((void*) win->webView->url);
        char* url_cp = _webui_str_dup(url);
        win->webView->url = url_cp;
        win->webView->navigate = true;
        _webui_webview_update(win);
        #endif

https://github.com/webui-dev/webui/blob/e1018c5d8c251fad9fa8fc2f9d2d50af06bd2fed/src/webui.c#L1366-L1374

                        #ifdef _WIN32
                        if (_webui.wins[i]->webView->cpp_handle) {
                            _webui_win32_wv2_set_stop(_webui.wins[i]->webView->cpp_handle, true);
                            _webui_webview_update(_webui.wins[i]);
                        }
                        #else
                        _webui.wins[i]->webView->stop = true;
                        _webui_webview_update(_webui.wins[i]);
                        #endif

https://github.com/webui-dev/webui/blob/e1018c5d8c251fad9fa8fc2f9d2d50af06bd2fed/src/webui.c#L3536-L3544

[YesDrX]

The linker error is for windows and macos:

https://github.com/YesDrX/nim-webui/actions/runs/20085517598/job/57621991373