Add FlashDataBuilder #428

Job	Run time
Check lib (x86_64-unknown-linux-gnu)	47s
Check lib (aarch64-unknown-linux-gnu)	1m 35s
Clippy (x86_64-unknown-linux-gnu)	23s
Check lib (armv7-unknown-linux-gnueabihf)	1m 15s
Check (x86_64-apple-darwin)	1m 6s
Clippy (aarch64-unknown-linux-gnu)	1m 31s
Check (x86_64-unknown-linux-gnu)	1m 31s
Clippy (armv7-unknown-linux-gnueabihf)	1m 35s
Check (x86_64-unknown-linux-musl)	43s
Check (x86_64-pc-windows-msvc)	2m 37s
Rustfmt	7s
Check (aarch64-unknown-linux-gnu)	2m 19s
Check MSRV (x86_64-unknown-linux-gnu)	42s
Check (armv7-unknown-linux-gnueabihf)	1m 41s
Check MSRV (aarch64-unknown-linux-gnu)	2m 48s
Unit Tests (x86_64-unknown-linux-gnu)	35s
Check MSRV (armv7-unknown-linux-gnueabihf)	2m 4s
Unit Tests (aarch64-unknown-linux-gnu)	2m 16s
Unit Tests (armv7-unknown-linux-gnueabihf)	1m 20s
	26m 55s

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