Add issue templates and update contribution guidelines

[tanay1337]

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[github-actions]

Overall readability score: 68.83 (🟢 +0.03)

File	Readability
CONTRIBUTING.md	75.72 (🟢 +1.31)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
CONTRIBUTING.md	75.72	68.87	8.04	7.4	9.72	7.5
	🟢 +1.31	🔴 -0.2	🟢 +0.61	🟢 +0.4	🟢 +0.64	🔴 -0.37

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	68.83	59.03	9.16	9.83	10.59	7.06
	🟢 +0.03	🟢 +0	🟢 +0.01	🟢 +0.01	🟢 +0.01	🔴 -0.01

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less