Add feature requests github template (#1171) #1855

Job	Run time
Build on windows-latest for repo global.json	17m 44s
Build on windows-latest for 6.0 stable	16m 4s
Build on windows-latest for 7.0 preview	15m 57s
Build on macos-latest for repo global.json	18m 19s
Build on macos-latest for 6.0 stable	20m 59s
Build on macos-latest for 7.0 preview	19m 50s
Build on ubuntu-latest for repo global.json	12m 18s
Build on ubuntu-latest for 6.0 stable	13m 6s
Build on ubuntu-latest for 7.0 preview	15m 6s
	2h 29m 23s

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