chore: add no-top-level-arrow-syntax rule to Deno Style Guide linter plugin

[iuioiua]

Towards #6551

Blocked by denoland/deno#28799

[codecov]

Codecov Report

Attention: Patch coverage is 81.57895% with 7 lines in your changes missing coverage. Please review.

Project coverage is 94.58%. Comparing base (40da1fb) to head (e4368a6).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
fs/_map_error.ts	25.00%	6 Missing ⚠️
_tools/lint_plugin.ts	95.83%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6558   +/-   ##
=======================================
  Coverage   94.57%   94.58%           
=======================================
  Files         579      579           
  Lines       43724    43752   +28     
  Branches     6492     6494    +2     
=======================================
+ Hits        41354    41381   +27     
- Misses       2330     2331    +1     
  Partials       40       40           

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[iuioiua]

This is only currently working on canary

[iuioiua]

Does this rule include non-exported arrow functions? The example snippet only exemplifies exported arrow functions.

[kt3k]

LGTM. Nice!

[kt3k]

Does this rule include non-exported arrow functions? The example snippet only exemplifies exported arrow functions.

I think this applies to non exported functions as well.