Added newsletter

[sandra9711]

Description

Added a component for newsletter with link in products part of footer

Fixed #263

Type of change

Please check options that are relevant to your PR.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [x] This change requires a documentation update

Checklist:

• [x] I have pulled the latest changes in the repository
• [x] I have squashed my commits
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings

[vaishali614]

@sandra9711 Apologies for the delay. We don't want a separate page for subscribing to our newsletter, instead you can just add an input field with a button to Subscribe, like here. Also, Newsletter is not a Product, so remove it from there and simply add this input field above "Get in Touch" section.

[sandra9711]

@vaishali614 Made all changes mentioned

[vaishali614]

@vaishali614 Made all changes mentioned

It's not in center, please keep it aligned with other components. Make sure to check for all screen-sizes. Other than that, it looks good to go.