feat: add parseInterpolationExpression, deprecate parseInterpolation

[fisker]

I found there is another parseInterpolationExpression method, so we don't need wrap input with {{}}.

[codecov-commenter]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (4dffea2) compared to base (96d2da7).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 4dffea2 differs from pull request most recent head ab91e41. Consider uploading reports for the commit ab91e41 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #241   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          302       299    -3     
  Branches        80        80           
=========================================
- Hits           302       299    -3     

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

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