refactor: refactor tools_entries.cpp into several smaller files (#1418)

plugins/builtin/source/content/tools/demangler.cpp

@@ -0,0 +1,30 @@
+#include <hex/helpers/utils.hpp>
+#include <hex/api/localization.hpp>
+
+#include <llvm/Demangle/Demangle.h>
+
+#include <imgui.h>
+
+#include <hex/ui/imgui_imhex_extensions.h>
+
+namespace hex::plugin::builtin {
+    namespace impl {
+        void drawDemangler() {
+            static std::string mangledName, demangledName;
+
+            if (ImGui::InputTextWithHint("hex.builtin.tools.demangler.mangled"_lang, "Itanium, MSVC, Dlang & Rust", mangledName)) {
+                demangledName = llvm::demangle(mangledName);
+
+                if (demangledName == mangledName) {
+                    demangledName = "???";
+                }
+            }
+
+            ImGui::Header("hex.builtin.tools.demangler.demangled"_lang);
+            if (ImGui::BeginChild("demangled", ImVec2(0, 200_scaled), true)) {
+                ImGui::TextFormattedWrappedSelectable("{}", demangledName);
+            }
+            ImGui::EndChild();
+        }
+    }
+}