Added Learn.md

Learn.md

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+If you would like to contribute code to the project, please follow these steps:
+
+-  Step 1: [Fork](https://github.com/DSC-JSS-NOIDA/blogzen) the repo first
+
+-  Step 2: Go to your Git terminal and clone it on your machine.
+   ```
+   git clone https://github.com/<your_github_username>/UMatter.git
+   ```
+-  Step 3: Add an upstream link to the main branch in your cloned repo
+   ```
+   git remote add upstream https://github.com/MonalikaPatnaik/UMatter.git
+   ```
+-  Step 4: Keep your cloned repository up to date by pulling from upstream. This will help you avoid merge conflicts while committing new changes.
+   ```
+   git pull upstream main
+   ```
+-  Step 5: Create your feature branch (This is a necessary step, so don't skip it)
+   ```
+   git checkout -b <feature-name>
+   ```
+-  Step 6: Track and stage your changes.
+
+   ```
+    # Track the changes
+    git status
+
+    # Add changes to Index
+    git add . or git add <file_name>
+   ```
+
+-  Step 7: Commit your changes (Write commit message as "Small Message")
+   ```
+   git commit -m "Write a meaningful but small commit message"
+   ```
+-  Step 8: Push the changes for review
+   ```
+   git push -u origin <branch-name>
+   ```
+-  Step 9: Create a pull request on GitHub. (Don't just hit the create a pull request button; you must write a PR message to clarify why and what you are contributing).