feat(keeper): add vm/qpath query

[gfanton]

This pull request introduces a new query vm/qpaths method to the vmHandler, which provides functionality for retrieving package paths with support for pagination.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 58 lines in your changes missing coverage. Please review.

Project coverage is 61.08%. Comparing base (641d2fd) to head (e229c92).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
gno.land/pkg/sdk/vm/handler.go	0.00%	32 Missing ⚠️
gnovm/pkg/gnolang/store.go	0.00%	17 Missing ⚠️
gno.land/pkg/sdk/vm/keeper.go	0.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2969      +/-   ##
==========================================
- Coverage   61.11%   61.08%   -0.04%     
==========================================
  Files         565      565              
  Lines       75396    75454      +58     
==========================================
+ Hits        46082    46088       +6     
- Misses      25947    26000      +53     
+ Partials     3367     3366       -1     

Flag	Coverage Δ
contribs/gnodev	61.46% <ø> (ø)
contribs/gnofaucet	15.31% <ø> (+0.85%)	⬆️
gno.land	67.34% <0.00%> (-0.60%)	⬇️
gnovm	66.13% <0.00%> (-0.05%)	⬇️
misc/genstd	80.54% <ø> (ø)
misc/logos	20.23% <ø> (+0.35%)	⬆️
tm2	62.12% <ø> (+0.01%)	⬆️

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