Add SQL, Erlang, and Forth highlighter implementations and tests for LSP process and transport handling.

- Added highlighters for new languages (SQL, Erlang, Forth) with filetype recognition.
- Updated and reorganized syntax files to maintain consistency and modularity.
- Introduced LSP transport framing unit tests and JSON decoding/dispatch tests.
- Refactored `LspManager`, integrating UTF-16/UTF-8 position conversions and robust diagnostics handling.
- Enhanced server start/restart logic with workspace root detection and logging to improve LSP usability.

TerminalRenderer.h

@@ -14,6 +14,21 @@ public:
 	~TerminalRenderer() override;
 
 	void Draw(Editor &ed) override;
+
+	// Enable/disable UTF-8 aware rendering (set by TerminalFrontend after locale init)
+	void SetUtf8Enabled(bool on)
+	{
+		utf8_enabled_ = on;
+	}
+
+
+	[[nodiscard]] bool Utf8Enabled() const
+	{
+		return utf8_enabled_;
+	}
+
+private:
+	bool utf8_enabled_ = true;
 };
 
-#endif // KTE_TERMINAL_RENDERER_H
+#endif // KTE_TERMINAL_RENDERER_H