feat: Add a lazily initialized in mem client for ffi etc. #36

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	41s
Android Build Only (aarch64-linux-android)	1m 4s
Checking docs	1m 25s
Android Build Only (armv7-linux-androideabi)	1m 6s
Checking fmt	26s
check_semver	1m 19s
clippy_check	1m 13s
Cross Test (i686-unknown-linux-gnu)	46s
cargo deny	27s
Minimal Supported Rust Version	1m 3s
codespell	4s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	1m 9s
CI Test Suite / Tests (ubuntu-latest, stable, all)	24s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 8s
CI Test Suite / Tests (ubuntu-latest, stable, none)	45s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1m 12s
CI Test Suite / Tests (ubuntu-latest, stable, default)	27s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	32s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	45s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	31s
	16m 27s

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