Added my name in challengers list

Signed-off-by: Kishan <kishan.rai99693@gmail.com>

Author: kishanrajput23

Challenges/challenge_1.md

@@ -5,6 +5,7 @@ We will start off with an easy task.
 
 Task: 
 Create a [new issue](https://github.com/scaleracademy/scaler-september-open-source-challenge/issues/new) on this repository with the following details to be added to the content of the issue: 
+Create a (new issue)[https://github.com/scaleracademy/scaler-september-open-source-challenge/issues/new] on this repository with the following details to be added to the content of the issue: 
 
 ```
 name: Add your name here

Challenges/challenge_13.md

@@ -0,0 +1,10 @@
+## Welcome to Challenge 13
+
+Welcome to the 13th Challenge 
+
+Today's challenge involves how to use ``git stash`` command effectively. You can refer on how to stash your commits [here](https://git-scm.com/book/en/v2/Git-Tools-Stashing-and-Cleaning)
+
+Task: 
+1. Inside the branch you created in the previous challenge ``your-username-details`` create a new file inside the ``contributors/<YOUR-GITHUB_USERNAME>/`` directory.
+2. Use the git stash command to move these changes to the stash area
+3. Delete the content from the stash area and share a screenshot of this inside the Github issue you created in the first challenge

Challenges/challenge_14.md

@@ -0,0 +1,11 @@
+## Welcome to Challenge 14
+
+Welcome to the 14th Challenge 
+
+Today is the first part of the two challenges related to resolving merge conflicts. You can take a look at [this article](https://www.atlassian.com/git/tutorials/using-branches/merge-conflicts) to learn more about merge conflicts. 
+
+As part of the challenge, try to create a scenario of a merge conflict locally in your system for a project that you can create. 
+
+Task: 
+1. Follow the article shared above and try to reproduce a case of merge conflict in your system for a project and try to resolve it 
+2. Share appropriate screenshot in the issue created in the first challenge. 

Challenges/challenge_15.md

@@ -0,0 +1,15 @@
+## Welcome to Challenge 15
+
+Welcome to the 15th Challenge 
+
+In this 2 part challenge, we will try to emulate and fix merge conflicts via git. 
+
+Today is the first part of this challenge: 
+
+Task: 
+1. Update your Forked Repo From the Original Repo. Also ensure that your branch ``your-user-name-details`` is also synced with the latest changes from the original repository
+
+2. In your branch ``your-user-name-details`` open the add your name to the list of challengers inside the ``challengers-list.md`` file by following the format in the file. 
+
+3. Push your change to reflect in the Pull Request created in previous challenges
+

challengers-list.md

@@ -0,0 +1,4 @@
+# List of challengers
+1. [Mrinal](https://github.com/mrinal1224)
+2. [Shivay](https://github.com/shivaylamba)
+3. [Kishan](https://github.com/kishanrajput23)