Enable I/O HW access in micro-python

[daniel-rossier]

• SPI access (Sense-HAT) - Proto with a C app
• FE/BE
• Demo app with Sense-HAT interactions from micro-python

[daniel-rossier]

• Imported code from SEEE
• Focus on the simple use case between the container and the SPI

[daniel-rossier]

• The LEDs are enabled in Linux.
• C application running in the SO3 container
• Interactions with the backend wichi is in the Sense-HAT driver
• App in micro-python using /dev entry to access the Sense-HAT frontend driver.

[daniel-rossier]

• Still alignment of SO3 with EMISO code to be done

[daniel-rossier]

• EMISO engine is working
• Continuing alignment

[daniel-rossier]

• The remaining work will be done only in full VT support.