[object/error] Add ability to rescue errors and introduce begin/rescue/end

[Flipez]

This fixes #93

[vercel]

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Name	Status	Preview	Updated
rocket-lang	✅ Ready (Inspect)	Visit Preview	Nov 1, 2022 at 10:36AM (UTC)
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[codecov]

Codecov Report

Merging #142 (542d378) into main (40839b4) will increase coverage by 0.25%.
The diff coverage is 93.84%.

@@            Coverage Diff             @@
##             main     #142      +/-   ##
==========================================
+ Coverage   87.23%   87.48%   +0.25%     
==========================================
  Files         102      105       +3     
  Lines        3635     3692      +57     
==========================================
+ Hits         3171     3230      +59     
  Misses        396      396              
+ Partials       68       66       -2     

Impacted Files	Coverage Δ
ast/rescue.go	0.00% <0.00%> (ø)
token/token.go	88.00% <ø> (ø)
ast/begin.go	88.88% <88.88%> (ø)
ast/block.go	92.85% <100.00%> (+5.35%)	⬆️
evaluator/block.go	100.00% <100.00%> (ø)
evaluator/evaluator.go	81.71% <100.00%> (+3.67%)	⬆️
object/error.go	100.00% <100.00%> (ø)
parser/begin.go	100.00% <100.00%> (ø)
parser/block.go	100.00% <100.00%> (ø)
parser/parser.go	100.00% <100.00%> (ø)
... and 1 more

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