feat: create db for kvindexer in AppCreator

[Vritra4]

create db for kvindexer inside of AppCreator() in order to be easily customized

NOTE: breaking changes in app.toml due to bumped kvindexer

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 26.32%. Comparing base (fb6e4c8) to head (42faa66).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
- Coverage   27.05%   26.32%   -0.74%     
==========================================
  Files         100      100              
  Lines       11109    11183      +74     
==========================================
- Hits         3006     2944      -62     
- Misses       7685     7820     +135     
- Partials      418      419       +1     

Files	Coverage Δ
app/test_helpers.go	80.00% <100.00%> (+0.22%)	⬆️
app/app.go	81.77% <66.66%> (ø)
app/encoding.go	44.11% <33.33%> (ø)

... and 9 files with indirect coverage changes

[beer-1]

LGTM