add wip about window to start and main screen

src/chat_gui/about.cpp

@@ -0,0 +1,54 @@
+#include "./about.hpp"
+
+#include "./version.hpp"
+
+#include <imgui.h>
+
+#include <string>
+
+void ImGuiTomatoAbout(void) {
+	if (ImGui::BeginTabBar("about")) {
+		if (ImGui::BeginTabItem("tomato")) {
+			std::string tomato_version_string {"tomato " TOMATO_VERSION_STR};
+			if (TOMATO_GIT_DEPTH != 0) {
+				tomato_version_string += "-" + std::to_string(TOMATO_GIT_DEPTH);
+			}
+			if (std::string_view{TOMATO_GIT_COMMIT} != "UNK") {
+				tomato_version_string += "+git.";
+				tomato_version_string += TOMATO_GIT_COMMIT;
+			}
+
+			ImGui::TextUnformatted(tomato_version_string.c_str());
+
+			ImGui::SameLine();
+			if (ImGui::SmallButton("click to copy")) {
+				ImGui::SetClipboardText(tomato_version_string.c_str());
+			}
+
+			ImGui::Separator();
+
+			ImGui::TextUnformatted("TODO: tomato license");
+
+			ImGui::EndTabItem();
+		}
+
+		if (ImGui::BeginTabItem("imgui")) {
+			ImGui::ShowAboutWindow();
+			ImGui::EndTabItem();
+		}
+
+		if (ImGui::BeginTabItem("others")) {
+			ImGui::TextUnformatted("TODO: list all the other libs and their licenses");
+			ImGui::EndTabItem();
+		}
+
+		if (ImGui::BeginTabItem("funding")) {
+			ImGui::TextWrapped("Your Help is needed, to keep the project alive, expand it's features and to inspire new features!");
+			ImGui::TextLinkOpenURL("https://github.com/sponsors/Green-Sky");
+			ImGui::TextUnformatted("Contact Me for more ways to help the project. :)");
+			ImGui::EndTabItem();
+		}
+
+		ImGui::EndTabBar();
+	}
+}

src/chat_gui/about.hpp

@@ -0,0 +1,5 @@
+#pragma once
+
+// not a window, just the content
+void ImGuiTomatoAbout(void);
+