docs: add example for creating & fetching a collection (#176) #634

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	52s
Cross Test (i686-unknown-linux-gnu)	5m 12s
Checking docs	57s
Minimal Supported Rust Version	1m 5s
codespell	10s
cargo deny	29s
Android Build Only (aarch64-linux-android)	1m 11s
Android Build Only (armv7-linux-androideabi)	1m 24s
Checking fmt	30s
clippy_check	1m 55s
check_semver	1m 37s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 57s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 24s
CI Test Suite / Tests (ubuntu-latest, stable, none)	56s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 13s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 10s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1m 9s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 43s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	1m 50s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 30s
	30m 14s

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