`import std` support #247

Job	Run time
Configure [aarch64-alpine-linux-musl]	4s
Configure [x86_64-unknown-linux-gnu]	3s
Configure [aarch64-unknown-linux-gnu]	6s
Configure [x86_64-alpine-linux-musl]	4s
Build [aarch64-alpine-linux-musl]	7m 16s
Build [x86_64-apple-darwin]	5m 3s
Build [x86_64-unknown-linux-gnu]	7m 19s
Build [x86_64-alpine-linux-musl]	7m 17s
Build [aarch64-apple-darwin]	3m 48s
Build [x86_64-pc-windows]	7m 19s
Build [aarch64-unknown-linux-gnu]	7m 18s
Test [${{ (matrix.host.container \|\| matrix.host.runs-on) }} ${{ (endsWith(matrix.host.runs-on, ('-arm' && 'arm64')) \|\| ((endsWith(matrix.host.runs-on, '-intel') && 'x64')) \|\| ((startsWith(matrix.host.runs-on, 'macos') && 'arm64')) \|\| 'x64') }} node:${{ matrix.node }}]	1s
Release	1s
	45m 39s

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