feat: ESP32 support #570

Job	Run time
Build & test wasm32 for browsers	50s
Checking fmt	20s
clippy_check	37s
cargo deny	28s
Minimal Supported Rust Version	31s
check_semver	42s
ESP32-C3 build check	32s
Cross Build Only (x86_64-unknown-freebsd)	24s
codespell	7s
Checking docs	32s
Android Build Only (armv7-linux-androideabi)	49s
Cross Test (i686-unknown-linux-gnu)	26s
CI Test Suite / minimal-crates (macOS-arm-latest)	22s
CI Test Suite / Tests (ubuntu-latest, stable, none)	21s
CI Test Suite / Tests (ubuntu-latest, stable, all)	22s
CI Test Suite / minimal-crates (ubuntu-latest)	17s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	57s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	54s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1m 1s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	40s
Android Build Only (aarch64-linux-android)	50s
CI Test Suite / Tests (ubuntu-latest, stable, default)	20s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	28s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	31s
	13m 21s

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