feat(i18n): Implement multilingual support with Polish and English translations

- Added translation context and provider for managing language state.
- Integrated translation functionality into existing components (TaskStatusDropdown, Navigation).
- Created LanguageSwitcher component for language selection.
- Updated task statuses and navigation labels to use translations.
- Added Polish translations for various UI elements, including navigation, tasks, projects, and contracts.
- Refactored utility functions to return localized strings for deadlines and date formatting.

src/components/NoteForm.js

@@ -1,8 +1,10 @@
 "use client";
 
 import React, { useState } from "react";
+import { useTranslation } from "@/lib/i18n";
 
 export default function NoteForm({ projectId }) {
+	const { t } = useTranslation();
 	const [note, setNote] = useState("");
 	const [status, setStatus] = useState(null);
 
@@ -17,10 +19,10 @@ export default function NoteForm({ projectId }) {
 
 		if (res.ok) {
 			setNote("");
-			setStatus("Note added");
+			setStatus(t("common.addNoteSuccess"));
 			window.location.reload();
 		} else {
-			setStatus("Failed to save note");
+			setStatus(t("common.addNoteError"));
 		}
 	}
 
@@ -29,7 +31,7 @@ export default function NoteForm({ projectId }) {
 			<textarea
 				value={note}
 				onChange={(e) => setNote(e.target.value)}
-				placeholder="Add a new note..."
+				placeholder={t("common.addNotePlaceholder")}
 				className="border p-2 w-full"
 				rows={3}
 				required
@@ -38,7 +40,7 @@ export default function NoteForm({ projectId }) {
 				type="submit"
 				className="bg-blue-600 text-white px-4 py-2 rounded"
 			>
-				Add Note
+				{t("common.addNote")}
 			</button>
 			{status && <p className="text-sm text-gray-600">{status}</p>}
 		</form>