Major refactor, scheduler rewrite, unikernel

[thomasw04]

• Unikernel for embedded targets
• Implements the new scheduler
• Implement a Page Frame Allocator
• Implement Virtual Memory Manager
• Add config includes
• Autogen linker script/irq handlers
• Remove old stuff
• Add clock/timing, setup RCC.
• Added fmt macro for defmt
• relocated hals
• integrated devicetrees
• various other stuff

[Copilot]

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[github-actions]

LCOV of commit 99bdf37 during Osiris CI #450

Total coverage: 25.64%

lcov: WARNING: lcov: WARNING: RC option 'lcov_branch_coverage' is deprecated.  Consider using 'branch_coverage. instead.  (Backward-compatible support will be removed in the future
Summary coverage rate:
  lines......: 25.6% (691 of 2695 lines)
  functions..: 18.0% (67 of 372 functions)
  branches...: no data found

Files changed coverage rate: n/a

[LuisRuisinger]

TODO: check for me later what exactly changes down the road with the underlying Zephyr includes