Add regex support to query syntax

[codchen]

Describe your changes and provide context

Add regex syntax so that queries like tx.topics MATCHES '\[.*,xyz,.*\]' can be written and executed correctly

Testing performed to validate your change

unit tests

[codecov]

Codecov Report

Merging #164 (b455a98) into main (962ce07) will decrease coverage by 0.07%.
The diff coverage is 62.50%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #164      +/-   ##
==========================================
- Coverage   59.10%   59.04%   -0.07%     
==========================================
  Files         281      281              
  Lines       38858    38913      +55     
==========================================
+ Hits        22968    22976       +8     
- Misses      14101    14138      +37     
- Partials     1789     1799      +10     

Files	Coverage Δ
internal/pubsub/query/query.go	66.31% <100.00%> (+0.91%)	⬆️
internal/pubsub/query/syntax/parser.go	70.76% <100.00%> (+0.45%)	⬆️
internal/pubsub/query/syntax/scanner.go	81.18% <100.00%> (+0.20%)	⬆️
internal/state/indexer/tx/kv/kv.go	68.86% <60.00%> (-0.50%)	⬇️
internal/state/indexer/block/kv/kv.go	57.14% <50.00%> (-0.60%)	⬇️

... and 19 files with indirect coverage changes

[jewei1997]

if we want this to be specifically the 2nd topic, wouldn't a regex like '\[.*,xyz,.*\]' work for cases where it is the 2nd or 3rd topic? I think we might need to do exclude commas in the first .* to make sure xyz is the second topic.

[codchen]

if we want this to be specifically the 2nd topic, wouldn't a regex like '\[.*,xyz,.*\]' work for cases where it is the 2nd or 3rd topic? I think we might need to do exclude commas in the first .* to make sure xyz is the second topic.

yeah exactly we need to exclude comma from the wildcard

[Kbhat1]

LGTM, we tested this on a node too right?

[jewei1997]

if we want this to be specifically the 2nd topic, wouldn't a regex like '\[.*,xyz,.*\]' work for cases where it is the 2nd or 3rd topic? I think we might need to do exclude commas in the first .* to make sure xyz is the second topic.

yeah exactly we need to exclude comma from the wildcard

Oh I see this is just adding general regex support.

[codchen]

LGTM, we tested this on a node too right?

yeah tested rpc request Events against local node