feat(migrations): add migrations module

[garrappachc]

Add MigrationsModule that handles running the migrations automatically on application startup.

[codecov]

Codecov Report

Merging #1143 (aad3791) into master (321c841) will decrease coverage by 0.92%.
The diff coverage is 94.44%.

@@            Coverage Diff             @@
##           master    #1143      +/-   ##
==========================================
- Coverage   95.35%   94.42%   -0.93%     
==========================================
  Files         164      182      +18     
  Lines        3358     3553     +195     
  Branches      315      335      +20     
==========================================
+ Hits         3202     3355     +153     
- Misses        154      187      +33     
- Partials        2       11       +9     

Impacted Files	Coverage Δ
src/migrations/services/migrations.service.ts	90.47% <90.47%> (ø)
src/app.module.ts	100.00% <100.00%> (ø)
src/migrations/migrations.module.ts	100.00% <100.00%> (ø)
src/migrations/stores/mongo-db.store.ts	100.00% <100.00%> (ø)
...igrations/1616081071738-new-configuration-model.js	56.00% <0.00%> (ø)
src/queue/errors/slot-occupied.error.ts	100.00% <0.00%> (ø)
src/queue/errors/player-not-in-the-queue.error.ts	100.00% <0.00%> (ø)
migrations/1616694341420-extended-player-roles.js	82.35% <0.00%> (ø)
...rations/1615906051508-move-keystore-to-database.js	40.00% <0.00%> (ø)
... and 13 more

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