feat: Add search options for string encoding and endianness (#1490)

Added search options for string encoding (UTF-8, UTF-16, UTF-32) and
endianness (Little, Big) in the hex editor. This enhancement allows
users to customize the search process based on different string
encodings and byte orders.

Affected files:
- `plugins/builtin/romfs/lang/de_DE.json`
- `plugins/builtin/romfs/lang/en_US.json`
- `plugins/builtin/romfs/lang/es_ES.json`
- `plugins/builtin/romfs/lang/it_IT.json`
- `plugins/builtin/romfs/lang/ja_JP.json`
- `plugins/builtin/romfs/lang/ko_KR.json`
- `plugins/builtin/romfs/lang/pt_BR.json`
- `plugins/builtin/romfs/lang/zh_CN.json`
- `plugins/builtin/romfs/lang/zh_TW.json`
- `plugins/builtin/source/content/views/view_hex_editor.cpp`

Resolves: #1325

---------

Co-authored-by: Nik <werwolv98@gmail.com>

plugins/builtin/include/content/popups/hex_editor/popup_hex_editor_find.hpp

@@ -0,0 +1,58 @@
+#pragma once
+
+#include "content/views/view_hex_editor.hpp"
+#include "hex/api/task_manager.hpp"
+
+#include <atomic>
+#include <optional>
+#include <string>
+
+namespace hex::plugin::builtin {
+
+    class PopupFind : public ViewHexEditor::Popup {
+    public:
+        explicit PopupFind(ViewHexEditor *editor) noexcept;
+        ~PopupFind() override;
+        void draw(ViewHexEditor *editor) override;
+
+    private:
+        void drawSearchDirectionButtons();
+        void drawTabContents();
+
+        std::optional<Region> findByteSequence(const std::vector<u8> &sequence);
+
+        std::string m_inputString;
+        std::vector<u8> m_searchByteSequence;
+        std::optional<Region> m_foundRegion = std::nullopt;
+
+        bool m_requestFocus = true;
+        std::atomic<bool> m_requestSearch = false;
+        std::atomic<bool> m_searchBackwards = false;
+        std::atomic<bool> m_reachedEnd = false;
+
+        enum class Encoding {
+            UTF8,
+            UTF16,
+            UTF32
+        };
+
+        enum class Endianness {
+            Little,
+            Big
+        };
+
+        enum class SearchMode : bool {
+            ByteSequence,
+            String
+        };
+
+        std::atomic<Encoding> m_stringEncoding = Encoding::UTF8;
+        std::atomic<Endianness> m_stringEndianness = Endianness::Little;
+        std::atomic<SearchMode> m_searchMode = SearchMode::ByteSequence;
+
+        TaskHolder m_searchTask;
+
+        void processInputString();
+    };
+
+} // namespace hex::plugin::builtin