Add usage instructions and technology overview to README

README.md

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+🛠️ How to Use
+Download the code
+Save the provided HTML code as studyplanner.html.
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+Open in a browser
+Double-click the file or open it with Chrome, Firefox, or Edge.
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+Add tasks
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+Enter your study task in the input box.
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+Click Add.
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+Mark tasks as completed
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+Click on a task to mark it done or undone.
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+Check your progress
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+The progress percentage updates automatically.
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+
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+🎨 Technologies Used
+HTML5 – Structure of the website.
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+CSS3 – Styling and responsive layout.
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+JavaScript – Task functionality, progress calculation, and localStorage.
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+
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+🚀 Future Improvements
+Add delete button for tasks.
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+Add categories/subjects for better organization.
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+Add dark mode toggle.
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+Add reminder notifications for tasks.
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+📌 Notes
+This website works completely offline.
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+Your tasks are saved only in the browser you use. Clearing browser data will delete all tasks.
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