Refactor project tasks page and navigation components

- Updated the description in ProjectTasksPage to a placeholder.
- Commented out the display of assigned email in ProjectTasksList.
- Removed the dashboard link from the navigation items.
- Changed the main link in the navigation to point to projects instead of the dashboard.
- Commented out the LanguageSwitcher and user role display in the navigation.
- Translated "Project Location" to "Lokalizacja projektu" in ProjectMap.
- Commented out the instruction for using the layer control in ProjectMap.
- Removed the label "Coordinates:" from the coordinates display in ProjectMap.
- Updated project and contract subtitles in translations to placeholders.
- Added a new empty validation schema file.

Dockerfile.dev

@@ -0,0 +1,23 @@
+# Use Node.js 22.11.0 as the base image
+FROM node:22.11.0
+
+# Install git for development
+RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+
+# Set the working directory
+WORKDIR /app
+
+# Copy package.json and package-lock.json (if any)
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of the app
+COPY . .
+
+# Expose the default Next.js port
+EXPOSE 3000
+
+# Start the dev server
+CMD ["npm", "run", "dev"]