Category & Recurrence Inputs added / READMEs added

[kevinngonzales]

Proposed changes

Added category input and recurrence input for user to add more detail to their expenses/income. Possible calendar page which shows when expenses are due and when it is pay day.

Link to Product Tracker

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Link to Figma/Zeplin

n/a

Types of changes

What types of changes does your code introduce to Periodikal? Put an x in the boxes that apply

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation Update (if none of the other choices apply)

Checklist

_Put an x in the boxes that apply. You can also fill these out after creating the PR.

• [ ] All apps build locally (npm run build:all)
• [ ] Lint and unit tests pass locally with my changes
• [ ] In the case of UI changes, I have locally verified no new browser console warnings were observed
• [ ] I have added necessary documentation (if appropriate)
• [ ] Any dependent changes have been merged and published in downstream modules

Further comments

n/a

[vinson-han]

class should be changed to className name convention due to "class" being a reserve keyword javascript. className is what React uses for jsx.