Add feature requests github template #1850

Job	Run time
Build on windows-latest for repo global.json	17m 12s
Build on windows-latest for 6.0 stable	18m 50s
Build on windows-latest for 7.0 preview	19m 32s
Build on macos-latest for repo global.json	16m 58s
Build on macos-latest for 6.0 stable	17m 45s
Build on macos-latest for 7.0 preview	20m 31s
Build on ubuntu-latest for repo global.json	12m 13s
Build on ubuntu-latest for 6.0 stable	12m 20s
Build on ubuntu-latest for 7.0 preview	13m 20s
	2h 28m 41s

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