Fix#12 UI Fixes

[zephyr004]

Overview

1. This PR fixes or fixes part of #12.
2. This PR does the following: Made UI changes in Login Activity and Sign Up Activity maintaining consistency, following the Figma design and the required guidelines.

Essential Checklist

• [✅ ] 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: ...".)
• [✅ ] "Allow edits from maintainers" is checked. (See here for instructions on how to enable it.)
• [ ✅] The PR is made from a branch that's not called "main/master".

Proof that changes are correct

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[Agrim2112]

@zephyr004 Increase the font sizes a bit and increase the top margin of the edit text fields in Login Activity. Also, have you tested it on physical devices?

[zephyr004]

@Agrim2112 Font size and the mentioned margin in Login Activity has been increased. Attached below is the image of how the layout looks on physical device.

[Agrim2112]

@zephyr004 Looks good, just need to make some minute changes. Also, ensure that the button signup/login button in both the activities are positioned similarly.

[Agrim2112]

@zephyr004 Good work