Changing the UI of height converter

[Drishti-jain21]

🛠️ Fixes Issue (Number) #887

👨‍💻 Changes proposed

I changed the background image, improved the UI of form and added text message when height is converted It even has a reset button, which was not there earlier.

✅ Check List (Check all the applicable boxes)

• [x] My code doesn't break any part of the project (Zero Octave-Javascript-Projects).
• [x] This PR does not contain plagiarized content.
• [x] My Addition/Changes works properly and matches the overall repo pattern.
• [x] The title of my pull request is a short description of the requested changes.

[Astrodevil]

Not working properly

[Drishti-jain21]

I'll check and revert back soon

[Drishti-jain21]

It is working fine on my system, I just checked

[Drishti-jain21]

[Anmol-Baranwal]

I prefer the previous UI as it was simple and present image has no appropriate styling and doesn't really signifies anything. Still, I would merge the PR if the above changes are done.

[github-actions[bot]]

Thank you @Drishti-jain21 for taking out your valuable time in order to contribute to our project. Looking forward for more such amazing contributions :)