Add RP2350 support #2143

Job	Run time
Build RP2350 0	5m 30s
Build RP2350 1	5m 46s
Build TinyUSB Examples	3m 52s
Build RP2350 2	5m 45s
Build RP2350 3	5m 46s
Build 0	6m 29s
Build 1	8m 52s
Build RP2350 4	5m 46s
Build 2	8m 14s
Build RP2350 5	5m 33s
Spelling, Style, Boards, Package	53s
Build 3	7m 11s
Build 4	6m 56s
Build 5	6m 24s
Mac (macOS-12)	1m 51s
Mac (macOS-14)	1m 50s
Build PlatformIO Examples	2m 41s
Build Every Variant 0	4m 53s
Windows	3m 2s
Build Every Variant 1	5m 28s
	1h 42m 42s

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