feat: オブジェクトリテラルで省略記法を使用可能にする

[uzmoi]

What

{ hoge: hoge }の代わりに{ hoge }と書けるようになります。
分割代入でもlet { hoge: hoge } = ..の代わりにlet { hoge } = ..と書けるようになります。

キーが文字列や予約語な場合には無効です。
予約語を変数名に使用する方法は無いはず。

isStaticがtrueな場所（AiSONなど）でも無効です。

Why

Resolve #873

Additional info (optional)

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Files with missing lines	Coverage Δ
src/parser/syntaxes/expressions.ts	95.54% <100.00%> (+6.35%)	⬆️

... and 29 files with indirect coverage changes

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