docs/rp2: Update general and PIO docs for RP2350 support. #18697
+101
−20
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Summary
This change updates rp2 port documentation to include support for the Raspberry Pi RP2350 microcontroller.
Previously, the docs (general.rst and pio.rst) only referenced the RP2040, despite RP2350 compatibility being already available.
Key additions cover RP2350 technical specs and PIO enhancements.
close: #17829
Testing
The documentation was built and verified locally.