fix: remove unraw dependency

[yslpn]

Description

Replace the unraw library with a lightweight custom implementation for decoding escape sequences.

unraw functionality is too redundant and is not used in the code now. We use a regular expression that only finds valid escape sequences. So I propose to use a more lightweight and simple implementation and remove the unraw dependency. This will not change the behavior for the user.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Examples update

Checklist

• I have read the CONTRIBUTING and CODE_OF_CONDUCT docs
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation (if appropriate)

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[github-actions]

size-limit report 📦

Path	Size
packages/core/dist/index.mjs	2.91 KB (0%)
packages/detect-locale/dist/index.mjs	618 B (0%)
packages/react/dist/index.mjs	1.35 KB (0%)

[yslpn]

Something is wrong with the size-limit report in pull requests. Locally on the branch, I get different numbers that look more like the truth. We got rid of 250 lines of unminified js code, which is about 1 kb.

Any ideas?)

[timofei-iatsenko]

@yslpn it checks out master (main) in the PR, probably because of the trigger, pull_request_target instead of pull_request

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 76.82%. Comparing base (6bb8983) to head (2d7d257).
Report is 195 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/core/src/i18n.ts	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2271      +/-   ##
==========================================
- Coverage   77.05%   76.82%   -0.24%     
==========================================
  Files          84       89       +5     
  Lines        2157     2498     +341     
  Branches      555      650      +95     
==========================================
+ Hits         1662     1919     +257     
- Misses        382      463      +81     
- Partials      113      116       +3     

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