micropython: add micropython component

components/language/micropython/docs/rp2/general.rst

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+.. _rp2_general:
+
+General information about the RP2xxx port
+=========================================
+
+The rp2 port supports boards powered by the Raspberry Pi Foundation's RP2xxx
+family of microcontrollers, most notably the Raspberry Pi Pico that employs
+the RP2040.
+
+Technical specifications and SoC datasheets
+-------------------------------------------
+
+For detailed technical specifications, please refer to the `datasheets
+<https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf>`_
+
+The RP2040 microcontroller is manufactured on a 40 nm silicon process in a 7x7mm
+QFN-56 SMD package. The key features include:
+
+* 133 MHz dual ARM Cortex-M0+ cores (overclockable to over 400 MHz)
+* 264KB SRAM in six independent banks
+* No internal Flash or EEPROM memory (after reset, the bootloader loads
+  firmware from either the external flash memory or USB bus into internal SRAM)
+* QSPI bus controller, which
+  supports up to 16 MB of external Flash memory
+* On-chip programmable LDO to generate core voltage
+* 2 on-chip PLLs to generate USB and core clocks
+* 30 GPIO pins, of which 4 can optionally be used as analog inputs
+
+The peripherals include:
+
+* 2 UARTs
+* 2 SPI controllers
+* 2 I2C contollers
+* 16 PWM channels
+* USB 1.1 controller
+* 8 PIO state machines