Docs: Add README with usage and project overview

Author: Chaitanya6Nli

Secure_Password_Manager/README

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+# 🔐 Secure Password Manager (CLI + GUI)
+
+This is a simple and secure Password Manager built with Python. It includes both a **Tkinter-based GUI (Graphical User Interface)** and a **CLI (Command Line Interface)** version.
+
+---
+
+## 📌 Features
+
+* ✅ Generate strong, random passwords
+* ✅ Choose what characters to include (lowercase, uppercase, digits, special characters)
+* ✅ Real-time password strength feedback
+* ✅ Save passwords with labels (e.g., Gmail, Netflix)
+* ✅ Encode/Encrypt passwords for security
+* ✅ View saved passwords with automatic decryption
+* ✅ GUI built using Python's `tkinter` library
+* ✅ CLI version with command-line options using `argparse`
+
+---
+
+## 💡 How It Works
+
+### Tkinter GUI
+
+The graphical interface is built using `tkinter`, Python’s standard GUI toolkit. It provides a clean interface for generating, encrypting, and viewing passwords.
+
+### Generate Password
+
+1. Choose the password length.
+2. Select character types using checkboxes.
+3. Hit the **Generate Password** button.
+4. The password is displayed with its strength (Weak, Medium, or Strong).
+5. The password is then **encrypted** and saved to a file.
+
+### View Saved Passwords
+
+1. Click the **View Saved Passwords** button in the GUI.
+2. If the encryption key exists, the program decrypts and displays all saved passwords in a pop-up window.
+3. If the key is missing or corrupted, an error message is shown.
+
+---
+
+## 🛠️ Technologies Used
+
+| Component | Tool/Library |
+|----------|--------------|
+| Programming Language | Python |
+| GUI Library | Tkinter |
+| Encryption | cryptography (Fernet) |
+| Encoding (CLI version) | base64 |
+| CLI Parser | argparse |
+| Version Control | Git |
+
+---
+
+## 🗃️ Project Structure
+
+```bash
+Password_Manager/
+├── password_manager_gui.py       # Tkinter-based GUI application
+├── password_manager_cli.py       # CLI-based password generator
+├── view_passwords_cli.py         # View decoded Base64 passwords (CLI)
+├── decrypt_passwords_cli.py      # Decrypt encrypted passwords (CLI)
+├── saved_passwords.txt           # File where encrypted passwords are saved
+├── secret.key                    # File containing Fernet encryption key
+├── README.md
+└── .gitignore
+```
+
+---
+
+## ⚠️ Security Note
+
+This project uses **Fernet encryption** to protect your saved passwords.
+
+Files like `secret.key` and `saved_passwords.txt` are excluded from version control using `.gitignore`.
+
+> Do not share your `secret.key` with anyone. If you lose it, saved passwords cannot be decrypted.
+
+---
+
+## 🧠 Ideal For
+
+- Python beginners learning `tkinter`
+- Students building secure Python projects
+- Learning encryption basics with `cryptography`
+- Practicing Git and GitHub workflow with versioned features
+
+---
+
+## ⚙️ Setup Instructions
+
+1. Clone the repo  
+   `git clone https://github.com/Your-Username/Secure_Password_Manager.git`
+
+2. Install dependencies  
+   `pip install cryptography`
+
+3. Run GUI  
+   `python password_manager_gui.py`
+
+4. Or use CLI  
+   `python password_manager_cli.py --length 12 --label Gmail --lower --upper --digits --specials`
+
+---
+
+## ⭐ GitHub Ready
+
+This project was built using proper Git practices:
+
+* Every feature added on a new branch
+* Meaningful commit messages
+* Clean merge history
+
+---