エラー型を追加

[FineArchs]

What

新しくエラー型を追加し、試験的にJson:parseに導入します。
#304 を受けて、ひとまずnameとinfoのprimitive-propsを持つだけのシンプルな型にしました。

Why

AiScriptの実行を停止せずに関数の実行が失敗したことを知らせる手段を作るため。

Additional info (optional)

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.20% 🎉

Comparison is base (0fa244f) 87.84% compared to head (1fed033) 88.05%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #323      +/-   ##
==========================================
+ Coverage   87.84%   88.05%   +0.20%     
==========================================
  Files          20       20              
  Lines        3292     3314      +22     
  Branches      537      541       +4     
==========================================
+ Hits         2892     2918      +26     
+ Misses        389      385       -4     
  Partials       11       11              

Files Changed	Coverage Δ
src/interpreter/lib/std.ts	75.17% <100.00%> (+0.17%)	⬆️
src/interpreter/primitive-props.ts	97.11% <100.00%> (+0.07%)	⬆️
src/interpreter/value.ts	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[FineArchs]

コンフリクトの解決を行いました。

[syuilo]

👍