sys: Implement more functionality into splash screen (#223)

* build: Add libcurl

* build: Stop the whole static linking on Windows mess. There's no use anymore

* sys: Added update detector and moved some startup tasks to splash screen

* sys: Updated ImHex icon

* fix: Settings button on welcome page once again works

* build: Fix build on Linux

* sys: Fixed splash window not searching all paths for resources

plugins/libimhex/include/hex/helpers/net.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <hex.hpp>
+#include <future>
+
+#include <curl/curl.h>
+#include <nlohmann/json.hpp>
+
+
+namespace hex {
+
+    template<typename T>
+    struct Response {
+        u32 code;
+        T response;
+    };
+
+    class Net {
+    public:
+        Net();
+        ~Net();
+
+        Response<std::string> getString(std::string_view url);
+        Response<nlohmann::json> getJson(std::string_view url);
+
+    private:
+        CURL *m_ctx;
+    };
+
+}

plugins/libimhex/include/hex/views/view.hpp

@@ -43,6 +43,7 @@ namespace hex {
         static void drawCommonInterfaces();
 
         static void showErrorPopup(std::string_view errorMessage);
+        static void showFatalPopup(std::string_view errorMessage);
 
         virtual bool hasViewMenuItemEntry();
         virtual ImVec2 getMinSize();