tinygobb: update and make it work again

[rminnich]

reduce the number of functions tinygobb updates
to just runone.

Add a placeholder cmds/exp/runone_tinygo.go,
so that gobusybox will not get confused.

[rminnich]

still trying to work out the way to make tinygo builds succeed. Interestingly, I can now build u-root for tamago with very little trouble, and it works in qemu (but not on usbarmory, quite yet)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3d6fd07) 75.33% compared to head (4907416) 75.33%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2815   +/-   ##
=======================================
  Coverage   75.33%   75.33%           
=======================================
  Files         432      432           
  Lines       42965    42965           
=======================================
+ Hits        32366    32368    +2     
+ Misses      10599    10597    -2     

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[tlaurion]

Eli5: how to use this? @rminnich ?

[rminnich]

I will add a readme.md

[tlaurion]

I will add a readme.md

@rminnich gentle reminder. I would be curious to see reduction of size and properly test this

[tlaurion]

@rminnich just saw your talk https://osfc.io/2023/talks/tamago-and-tinygo-working-with-firmware-and-kernel-written-in-go/

I will add a readme.md

Doesn't explain the usage, but explain the why's.
Good stuff!