Created About Us Page

[Avish-Madushanka]

Fixes #526

Describe the changes you've made

• Created a new about us page
• Added HTML and CSS to structure and style the "About Us" page.
• Inserted content to introduce the website. ( inserted the content which was available in the Readme file.
• Linked the "About Us" page to the website's navigation bar and footer

Deploy your changes to github page or netlify and mention deployment link:

https://avish-madushanka.github.io/Movie-Streaming-Website/

Describe if there is any unusual behaviour of your code

NA

Additional context (OPTIONAL)

Checklist

• [x] I have mentioned related issue number in PR description.
• [x] I have added screenshots and related demo links of my changes..
• [x] The title of my pull request is a short description of the requested changes.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] Open Source Program names: Hacktoberfest 2023

[QAZIMAAZARSHAD]

There is an issue with the home page navigation bar.

Remove the address and map section from the About Us page as it is already present on the Contact page. Add some other designs/Images instead. Refer to some other websites and take inspiration from those about pages.