feat: adding unit tests for typography component

[reachaadrika]

Description

• Typography in AsyncAPI includes 3 main components :

• Heading : This component has heading which has props like 'typeStyle' and 'textColor' , and levels , which when we pass to heading when required we can change it accordingly .
  Here are the tests I have included for this component :

1. renders the heading with the default props
2. renders the heading with custom props

NOTE : For this component I have not included 'data-testids' since testing was required for specific level tag headings and already passed props .

• Paragraph : This component also has some textStyle and textColor Props .
  The tests I have included here are as follows :

1. renders the paragraph with the default props
2. renders the paragraph with custom props
   
   

• TextLink : For this component the tests I have included are as follows :

1. renders a link with the provided props and contentpassed

Related issue(s)
fixes #1792

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[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	61
🟢 Accessibility	98
🟢 Best practices	100
🟢 SEO	100
🔴 PWA	30

Lighthouse ran on https://deploy-preview-1793--asyncapi-website.netlify.app/

[akshatnema]

/rtm