Enable more linters and fix reported issues

[fxamacker]

Description

Added .golangci.yml to enable more linters in CI. Fixed all reported issues.

Closes #281

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• [x] Targeted PR against main branch
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [x] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #283 (132dfb3) into main (cfaf052) will increase coverage by 0.06%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #283      +/-   ##
==========================================
+ Coverage   68.99%   69.06%   +0.06%     
==========================================
  Files          14       14              
  Lines        7306     7306              
==========================================
+ Hits         5041     5046       +5     
+ Misses       1631     1627       -4     
+ Partials      634      633       -1     

Impacted Files	Coverage Δ
errors.go	19.70% <ø> (ø)
storage.go	79.13% <ø> (+0.34%)	:arrow_up:
array.go	76.15% <100.00%> (ø)
map.go	71.78% <100.00%> (+0.10%)	:arrow_up:
map_debug.go	55.50% <100.00%> (ø)
settings.go	92.30% <100.00%> (ø)

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