feat(nodebuilder/node | api): Version the API

[renaynay]

Introduce a version string to the API

Resolves #1345

[renaynay]

Kinda hesitant to merge this til we have header.Subscription endpoint - but who knows how long gomock will take to impl support for generics.

[distractedm1nd]

Please check api/docgen/openrpc.go line 23 - there is a const there that declares the api version, so we should combine these

[renaynay]

Marking ready for review as API is not yet stable so let's just make it first minor version.

[codecov-commenter]

Codecov Report

Merging #1901 (7267277) into main (045c4fe) will decrease coverage by 3.21%.
The diff coverage is 59.52%.

@@            Coverage Diff             @@
##             main    #1901      +/-   ##
==========================================
- Coverage   57.79%   54.58%   -3.21%     
==========================================
  Files         245      214      -31     
  Lines       16184    13631    -2553     
==========================================
- Hits         9354     7441    -1913     
+ Misses       5882     5403     -479     
+ Partials      948      787     -161     

Impacted Files	Coverage Δ
api/docgen/openrpc.go	0.00% <ø> (ø)
das/coordinator.go	89.18% <ø> (ø)
das/daser.go	67.03% <ø> (ø)
das/subscriber.go	88.23% <ø> (ø)
das/worker.go	96.33% <ø> (ø)
header/headertest/testing.go	83.39% <0.00%> (ø)
header/verify.go	88.00% <ø> (ø)
libs/fraud/proof.go	70.96% <ø> (ø)
libs/fraud/testing.go	90.27% <ø> (ø)
nodebuilder/core/module.go	80.95% <ø> (ø)
... and 23 more

... and 3 files with indirect coverage changes

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