feat-#378: created readme for git conflicts

GIT_CONFLICTS.md

@@ -0,0 +1,158 @@
+## Common QnA
+
+<details>
+<summary>
+<em>How to Hard Sync local Master with Original Upstream</em>
+</summary>
+
+Follow these steps in your main branch
+(upstream" is the original repository and "origin" is the fork one) :
+- ```sh
+  git checkout main
+  git pull upstream main
+  git reset --hard upstream/main
+  git push origin main --force
+  ```
+</details>
+
+<details>
+<summary>
+<em>Why the previous commits of another branch are showing in the new branch</em>
+</summary>
+
+Let's say you have this repository with branch 'prev_branch'
+
+```sh
+---o---o---A    prev_branch
+```
+
+Let's say you commit something A in prev_branch and created new branch 'new_branch'1, 
+it won't differ until you start commiting to new branch 
+
+```sh
+---o---o---A    prev_branch + new_branch
+```
+
+Then you commit B in newbranch 
+
+```sh
+---o---o---A      prev_branch
+            \
+             B    new_branch
+```
+
+The new commit B has A as its parent commit. Now prev_branch and new_branch differ in some way.
+
+```sh
+---o---o---A---X---Y    prev_branch
+            \
+             B---Z      new_branch
+```
+## Summary
+
+When you create a new branch from a particular branch, you'll start from the point where that branch currently is. So all commit history will be there in the new branch as well.</br>
+A good rule of thumb is to always create a new branch from the branch that you intend to eventually merge the new branch into (main branch). So if D is intended to be merged into main at some future point in time, create it from the current tip of main.
+
+For more details refer [blog](https://www.reddit.com/r/git/comments/l7epj0/why_does_my_new_branch_contain_commits_from/) / [blog](https://stackoverflow.com/questions/37010110/git-pushes-old-commit-in-different-branch-to-new-branch/78666984#78666984)
+
+Follow this while creating new branch and commiting changes:
+```sh
+- git checkout main/master
+- git branch -b new_branch
+- git add .
+- git commit -m "message"
+```
+
+</details>
+
+<details>
+<summary>
+<em>Edit a commit</em>
+</summary>
+
+
+1. Convenient way to modify the most recent commit
+   ```sh
+    # Edit src.js and main.js
+    git add src.js
+    git commit 
+    # Realize you forgot to add the changes from main.js 
+    git add main.js 
+    git commit --amend --no-edit
+   ```
+2. Using git reset
+   ```sh
+    git add .
+    git commit -m "This commit is a mistake"
+    git reset HEAD~
+    git add main.js
+    git commit -m "This commit corrects the mistake"
+    ```
+
+3. To undo the last two commits, use the commands:
+   ```sh
+   git add
+   git commit -m "This commit is a mistake"
+   # make changes to files
+   git add .
+   git commit -m "This commit is another mistake"
+   # want to go back to 2nd last commit to make changes
+   git reset HEAD~2
+   # make changes
+   git add .
+   git commit -m "this commit corrects both mistakes"
+   ```
+   for more info refer this [blog](https://sentry.io/answers/undo-the-most-recent-local-git-commits/)
+
+ 4. Change the last commit message
+    ```sh
+    # it will change the last commit's message
+    git commit --amend -m "New commit message" 
+    ```
+    ![git ammend showcase](https://github.com/rushil-b-patel/wanderlust/assets/96254453/4c5e73b1-e466-42b4-9053-d7044be4a50e)
+    for more info, watch this [video](https://www.youtube.com/watch?v=q53umU5vMkk)
+</details>
+
+
+<details>
+<summary>
+<em>To Check the commit Tree:</em>
+</summary>
+
+  ```sh
+  #Run below to visualize the commit tree.
+  gitk 
+  git log show commit logs.
+  ```
+</details>
+
+<details>
+<summary>
+<em>Rebase</em>
+</summary>
+
+  ```sh
+  #Fetch the latest changes
+  git fetch main
+  #Rebase onto the upstream branch
+  git rebase upstream/main`
+  ```
+</details>
+
+<details>
+<summary>
+<em>Good Practice</em>
+</summary>
+
+  1. Avoid committing unnecessary files:
+
+     ```sh
+     #Avoid using which commits everything.
+     git commit -a
+     ```
+
+  2. Use targeted commit commands:
+     ```sh
+     git add specific file
+     ```    
+</details>