Core: Add a test suite (#9297)

Adds a test suite for testing hyprland's features with a runtime tester

---------

Co-authored-by: Mihai Fufezan <mihai@fufexan.net>

hyprtester/plugin/src/main.cpp

@@ -0,0 +1,43 @@
+#include <unistd.h>
+#include <src/includes.hpp>
+#include <sstream>
+#include <any>
+
+#define private public
+#include <src/config/ConfigManager.hpp>
+#include <src/config/ConfigDescriptions.hpp>
+#undef private
+
+#include "globals.hpp"
+
+// Do NOT change this function.
+APICALL EXPORT std::string PLUGIN_API_VERSION() {
+    return HYPRLAND_API_VERSION;
+}
+
+static SDispatchResult test(std::string in) {
+    bool        success = true;
+    std::string errors  = "";
+
+    if (g_pConfigManager->m_configValueNumber != CONFIG_OPTIONS.size() + 1 /* autogenerated is special */) {
+        errors += "config value number mismatches descriptions size\n";
+        success = false;
+    }
+
+    return SDispatchResult{
+        .success = success,
+        .error   = errors,
+    };
+}
+
+APICALL EXPORT PLUGIN_DESCRIPTION_INFO PLUGIN_INIT(HANDLE handle) {
+    PHANDLE = handle;
+
+    HyprlandAPI::addDispatcherV2(PHANDLE, "plugin:test:test", ::test);
+
+    return {"hyprtestplugin", "hyprtestplugin", "Vaxry", "1.0"};
+}
+
+APICALL EXPORT void PLUGIN_EXIT() {
+    ;
+}