fix: parseNamespace for <= 10 byte namespace IDs

[rootulp]

Closes #2321

[codecov-commenter]

Codecov Report

Merging #2325 (a30025b) into main (f05b71f) will increase coverage by 0.12%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##             main    #2325      +/-   ##
==========================================
+ Coverage   50.55%   50.68%   +0.12%     
==========================================
  Files         154      154              
  Lines        9733     9736       +3     
==========================================
+ Hits         4921     4935      +14     
+ Misses       4385     4373      -12     
- Partials      427      428       +1     

Impacted Files	Coverage Δ
state/core_access.go	27.53% <0.00%> (-0.31%)	⬇️
cmd/celestia/rpc.go	12.65% <100.00%> (+2.71%)	⬆️

... and 4 files with indirect coverage changes

[Wondertan]

@rootulp, note that I am waiting for @distractedm1nd to return from sick leave and look deeper into this PR, as he is an author. I am not deep in the context of rpc cli

[distractedm1nd]

Sent @rootulp a fix for the missing test case and added two additional ones, now the coverage is pretty good. Once applied i will approve

[rootulp]

Synced w/ @distractedm1nd offline and parseNamespace is intended to only be used for the namespace ID portion of a namespace so a test case in this PR is incorrect.

I'll push a few commits to this PR that renames things like namespace to namespace ID where applicable but we should really do #2301 ASAP.

[rootulp]

The scope of this PR has increased b/c it wasn't clear to me what the original intended behavior was. Would appreciate extra attention when reviewing b/c this couples a fix, refactor, and behavior change (left pad instead of right pad)

[Wondertan]

Synced w/ @distractedm1nd offline and parseNamespace is intended to only be used for the namespace ID portion of a namespace so a test case in this PR is incorrect.

@distractedm1nd, why do we want to disable versioning here?

[Wondertan]

LGTM

[Wondertan]

I still don't get whats the point of panicking on user input though

[Wondertan]

Good catch @rootulp