Issue templates for the repo using new github issue forms

[avats-dev]

Resolves #1

This PR adds issue templates using new interactive github issue forms feature for following tasks:

• bug reporting
• documentation issues
• feature suggestion

Better ease of use for issue reporting with interactive form.

[lohanidamodar]

@avats-dev Great work. One more change before we can approve. We have made few changes in the language and also the format of Code of conduct. Please check https://github.com/appwrite/appwrite template and update accordingly.
Thank you.

[christyjacob4]

Please address the comments

[avats-dev]

I have updated the PR with the required changes. Please review it and LMK if you need any more tweaks. Thanks 🎉

[christyjacob4]

THANK YOU! All changes merged 🥳

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