(feat) day 31 - Prototype and Prototype Chain

README.md

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 - **`Day 29: Object Oriented Programming (OOP) Explained with Real-Life Analogies`** - [Watch Video](https://www.youtube.com/watch?v=oRQOiyO-kHg) || [Source Code](https://github.com/tapascript/40-days-of-javascript/blob/main/day-29/README.md)
 - **`Day 30: From Zero to OOP Hero with JavaScript ES6 Classes`** - [Watch Video](https://youtu.be/kG5t34ciG9w) || [Source Code](https://github.com/tapascript/40-days-of-javascript/blob/main/day-30/README.md)
+- **`Day 31: Master JavaScript Prototypes and Object Patterns - Confused to Confident!`** - [Watch Video](https://youtu.be/Uru85QW9zkk) || [Source Code](https://github.com/tapascript/40-days-of-javascript/blob/main/day-31/README.md)

day-31/README.md

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+# Day 31 - 40 Days of JavaScript - Prototype & Prototype Chain
+
+## **🎯 Goal of This Lesson**
+
+- ✅ What Can You Expect
+- ✅ JavaScript Object Literals Pattern
+- ✅ Ways To Extract Values From Objects
+- ✅ JavaScript Object and The const Keyword
+- ✅ JavaScript Functions vs Methods
+- ✅ The Constructor Function Pattern
+- ✅ Composing Objects and References
+- ✅ Object Prototypes
+- ✅ Prototype Chain
+- ✅ Constructor Function Visually
+- ✅ The "prototype" Property
+- ✅ The "prototype" Visually
+- ✅ Prototype To Save Memory
+- ✅ Prototype Chain(Lookup) Visually
+- ✅ JavaScript Class Pattern
+- ✅ JavaScript Class Inheritance
+- ✅ The Object.create() Pattern
+- ✅ How To Get Prototype Of An Object
+- ✅ How To Set An Object Prototype
+- ✅ The Closing Notes
+
+## 🫶 Support
+
+Your support means a lot.
+
+- Please SUBSCRIBE to [tapaScript YouTube Channel](https://youtube.com/tapasadhikary) if not done already. A Big Thank You!
+- Liked my work? It takes months of hard work to create quality content and present it to you. You can show your support to me with a STAR(⭐) to this repository.
+
+    > Many Thanks to all the `Stargazers` who have supported this project with stars(⭐)
+
+### 🤝 Sponsor My Work
+
+I am an independent educator and open-source enthusiast who creates meaningful projects to teach programming on my YouTube Channel. **You can support my work by [Sponsoring me on GitHub](https://github.com/sponsors/atapas) or [Buy Me a Cofee](https://buymeacoffee.com/tapasadhikary)**.
+
+## Video
+
+Here is the video for you to go through and learn:
+
+[![day-31](./banner.png)](https://youtu.be/Uru85QW9zkk "Video")
+
+## **👩‍💻 🧑‍💻 Assignment Tasks**
+
+Please find the task assignments in the [Task File](./task.md).

day-31/task.md

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+# Tasks
+
+Please complete the following tasks and post them on the tapaScript Discord under "40 Days of JavaScript".
+
+> **DO NOT USE AI to FIND ANSWERS**. If you are stuck, let's discuss it on DISCORD and learn. Also, please note that none of the answers need you to create any UI. Just focus on the logic building and print the output on the browser console.
+
+## 1. Create a Simple Prototype Chain
+
+- Define a base object animal with a method eat.
+- Create another object dog that inherits from animal using Object.create.
+- Call eat from dog and explain how the prototype chain resolves it.
+
+## 2. Build a Custom Constructor Function
+
+- Create a constructor function Book(title, author).
+- Add a method getDetails() to the prototype of Book.
+- Instantiate two books and show they share the method from the prototype.
+
+## 3. Compare Object Creation Patterns
+
+Create three objects using:
+
+- Object literals
+- Constructor functions
+- Object.create
+
+Add similar methods and compare how inheritance works in each pattern.
+
+## 4. Simulate a Real-World Inheritance Chain
+
+- Simulate a real-life hierarchy: Person → Student → GraduateStudent.
+- Each level should add its own methods or properties using prototypes.
+- Show how a GraduateStudent can access methods from both Student and Person.
+
+## 5. Object.create vs Class vs Constructor Function
+
+- Implement the same User entity using:
+  - Constructor Function
+  - ES6 Class
+  - Object.create
+- Write a summary comparing syntax, readability, and prototype behavior.