feat(quickactions): add customvariable support

[sogehige]

CHECKLIST

• I read contributing docs

[codecov]

Codecov Report

Merging #4729 (b1e962f) into master (324479d) will increase coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4729      +/-   ##
==========================================
+ Coverage   44.57%   44.67%   +0.09%     
==========================================
  Files         539      539              
  Lines       21862    21862              
  Branches     3313     3313              
==========================================
+ Hits         9746     9767      +21     
+ Misses      12116    12095      -21     

Flag	Coverage Δ
mysql	53.84% <ø> (+0.13%)	⬆️
postgres	53.59% <ø> (-0.03%)	⬇️
sqlite	49.59% <ø> (+0.43%)	⬆️

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Impacted Files	Coverage Δ
src/database/entity/dashboard.ts	100.00% <ø> (ø)
src/systems/bets.ts	67.58% <0.00%> (-0.55%)	⬇️
src/systems/timers.ts	81.92% <0.00%> (+0.60%)	⬆️
src/systems/points.ts	73.06% <0.00%> (+7.07%)	⬆️

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