add and improve icons #1217

Job	Run time
Code Coverage (ubuntu-latest)	2m 29s
MinSRV	1m 46s
Style (ubuntu-latest)	6m 29s
Build (ubuntu-latest, arm-unknown-linux-gnueabihf, use-cross)	6m 32s
Style (macos-latest)	6m 32s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, use-cross)	6m 4s
Style (windows-latest)	9m 35s
Build (ubuntu-latest, aarch64-unknown-linux-musl, use-cross)	5m 19s
Build (ubuntu-latest, i686-unknown-linux-gnu, use-cross)	5m 56s
Build (ubuntu-latest, i686-unknown-linux-musl, use-cross)	5m 4s
Build (ubuntu-latest, x86_64-unknown-linux-gnu, use-cross)	5m 34s
Build (ubuntu-latest, x86_64-unknown-linux-musl, use-cross)	5m 5s
Build (macos-latest, x86_64-apple-darwin)	5m 11s
Build (macos-latest, aarch64-apple-darwin)	3m 34s
Build (windows-latest, i686-pc-windows-gnu)	7m 4s
Build (windows-latest, i686-pc-windows-msvc)	9m 47s
Build (windows-latest, x86_64-pc-windows-gnu)	13m 46s
Build (windows-latest, x86_64-pc-windows-msvc)	8m 10s
	1h 53m 57s

Provide feedback