chore: add PR template #2371

Job	Run time
Cancel previous runs	4s
Build Clarinet Distributions (ubuntu-latest, linux, x86_64-unknown-linux-gnu, x64, glibc)	24m 9s
Build Clarinet Distributions (windows-latest, windows, x86_64-pc-windows-msvc, x64)	51m 1s
Build Clarinet Distributions (macos-latest, darwin, x86_64-apple-darwin, x64)	35m 28s
Build Clarinet Distributions (macos-latest, darwin, aarch64-apple-darwin, arm64)	32m 37s
Build Clarity REPL Distribution	7m 37s
Audit and format	40s
Get Release Info	6s
Build Stacks Devnet JS Distributions (ubuntu-latest, linux, x86_64-unknown-linux-gnu, x64, glibc)	10m 10s
Build Stacks Devnet JS Distributions (windows-latest, windows, x86_64-pc-windows-msvc, x64)	3s
Build Stacks Devnet JS Distributions (macos-latest, darwin, x86_64-apple-darwin, x64)	4s
Build Stacks Devnet JS Distributions (macos-latest, darwin, aarch64-apple-darwin, arm64)	1m 5s
Build Stacks Devnet JS Distributions (ubuntu-latest, linux, x86_64-unknown-linux-musl, x64, musl)	18s
Create Clarinet Docker Image	32m 57s
Release	0s
	3h 16m 19s

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