Fixes #3 Made the changes to the necessary XML for handling login activity

[ritankarsaha]

Overview

FIXES #3

1. This PR fixes or fixes part of #3
2. This PR does the following: [
   1. This PR adds modifies the activity_login.xml file inside the layout folder to modify the login page accoridngly as displayed in the figma design.
   2. This PR also adds a background.png file in the drawable folder of the res folder to render the background image into the activity_login.xml file.

Essential Checklist

• [ x] The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• [x ] "Allow edits from maintainers" is checked. (See here for instructions on how to enable it.)
• [ x] The PR is made from a branch that's not called "main/master".

Proof that changes are correct

This proves that the changes made are authentic and it is properly rendered back into activity_login.xml file.

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Thank You.

[ritankarsaha]

@Agrim2112 I have fixed the issue #3 and also opened a PR for the same #5

[ritankarsaha]

@Agrim2112 I have made all the necessary changes and pushed a new commit into the PR-

1. Giving proper ID to all views according to the convention.
2. The EditText options have been made using custom edit text defined in the drawable folder separately.
3. Used Relative Layout to add overlapping between the image and Card View.

PROOF OF CHANGES:-

Thank You.