Add feature requests github template #1851

Job	Run time
Build on windows-latest for repo global.json	16m 35s
Build on windows-latest for 6.0 stable	16m 3s
Build on windows-latest for 7.0 preview	19m 42s
Build on macos-latest for repo global.json	19m 18s
Build on macos-latest for 6.0 stable	18m 23s
Build on macos-latest for 7.0 preview	19m 49s
Build on ubuntu-latest for repo global.json	12m 0s
Build on ubuntu-latest for 6.0 stable	13m 0s
Build on ubuntu-latest for 7.0 preview	13m 52s
	2h 28m 42s

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