feat(shwap): Add axis roots to Accessor

[walldiss]

Add axis roots to all Accessor implementations. It will allow server side to handle namespace requests without the need to know exact rowIdxes beforehand.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 71.33333% with 43 lines in your changes missing coverage. Please review.

Please upload report for BASE (shwap@d807843). Learn more about missing BASE report.

Files	Patch %	Lines
share/eds/edstest/testing.go	0.00%	12 Missing ⚠️
store/file/ods.go	80.39%	6 Missing and 4 partials ⚠️
share/new_eds/proofs_cache.go	61.90%	4 Missing and 4 partials ⚠️
share/new_eds/close_once.go	0.00%	4 Missing ⚠️
store/cache/noop.go	0.00%	3 Missing ⚠️
share/new_eds/nd.go	50.00%	1 Missing and 1 partial ⚠️
share/new_eds/rsmt2d.go	60.00%	1 Missing and 1 partial ⚠️
share/root.go	0.00%	1 Missing ⚠️
store/store.go	95.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             shwap    #3586   +/-   ##
========================================
  Coverage         ?   47.78%           
========================================
  Files            ?      317           
  Lines            ?    18708           
  Branches         ?        0           
========================================
  Hits             ?     8939           
  Misses           ?     8621           
  Partials         ?     1148           

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[Wondertan]

first look, still need to go over new odsfile logic

[Wondertan]

Lets mb add in the comment that the cache does not synchronize access of u\nderlying accessor