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/ProjectStatusDropdown.js

@@ -3,12 +3,14 @@
 import { useState, useEffect, useRef } from "react";
 import { createPortal } from "react-dom";
 import Badge from "@/components/ui/Badge";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ProjectStatusDropdown({
 	project,
 	size = "md",
 	showDropdown = true,
 }) {
+	const { t } = useTranslation();
 	const [status, setStatus] = useState(project.project_status);
 	const [loading, setLoading] = useState(false);
 	const [isOpen, setIsOpen] = useState(false);
@@ -21,19 +23,19 @@ export default function ProjectStatusDropdown({
 
 	const statusConfig = {
 		registered: {
-			label: "Registered",
+			label: t("projectStatus.registered"),
 			variant: "secondary",
 		},
 		in_progress_design: {
-			label: "In Progress (Design)",
+			label: t("projectStatus.in_progress_design"),
 			variant: "primary",
 		},
 		in_progress_construction: {
-			label: "In Progress (Construction)",
+			label: t("projectStatus.in_progress_construction"),
 			variant: "primary",
 		},
 		fulfilled: {
-			label: "Completed",
+			label: t("projectStatus.fulfilled"),
 			variant: "success",
 		},
 	};