Upgrades issue templates to use GitHub issue forms ✍️

[drph4nt0m]

Completes #8

[lohanidamodar]

@drph4nt0m 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.

[drph4nt0m]

@lohanidamodar check now.

[lohanidamodar]

Great work @drph4nt0m 🚀 Just a small fix.

[christyjacob4]

THANK YOU! All changes merged 🥳

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