fix #181 : added input sanitisation

[Om-Thorat]

Overview

1. This PR fixes or fixes part of [BUG]: Missing Sanitisation on the backend.  #181 .
2. This PR does the following: Adds input sanitisation to the title and description field in events so that Html or Js injection isn't possible.

Essential Checklist

• The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
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Proof that changes are correct

vid.mp4

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[Om-Thorat]

Added a markdown parser and tailwind/typography to render the md html on the page.

Screenshots to show the change.

[Kushdapush]

Looks good, lets get this moving @AkashPaloju