feat: support parse as AST

[JounQin]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 8aae9d1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
sh-syntax	Minor

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[codecov]

Codecov Report

Merging #10 (8aae9d1) into main (66b5efc) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #10   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines           54        61    +7     
  Branches        19        22    +3     
=========================================
+ Hits            54        61    +7     

Impacted Files	Coverage Δ
src/types.ts	100.00% <ø> (ø)
src/index.ts	100.00% <100.00%> (ø)
src/processor.ts	100.00% <100.00%> (ø)

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