style: fix path checking.

- Add all necessary files to the path, using globs when necessary.
- Remove `Pathname` monkeypatch

Library/Homebrew/extend/pathname.rb

@@ -469,11 +469,6 @@ def dylib?
     false
   end
 
-  sig { returns(T::Boolean) }
-  def tap?
-    !Tap.from_path(self).nil?
-  end
-
   sig { returns(T::Array[String]) }
   def rpaths
     []

Library/Homebrew/style.rb

@@ -44,9 +44,9 @@ def self.check_style_impl(files, output_type,
                               debug: false, verbose: false)
       raise ArgumentError, "Invalid output type: #{output_type.inspect}" if [:print, :json].exclude?(output_type)
 
-      ruby_files = []
-      shell_files = []
-      actionlint_files = []
+      ruby_files = T.let([], T::Array[Pathname])
+      shell_files = T.let([], T::Array[Pathname])
+      actionlint_files = T.let([], T::Array[Pathname])
       Array(files).map(&method(:Pathname))
                   .each do |path|
         case path.extname
@@ -57,8 +57,14 @@ def self.check_style_impl(files, output_type,
         when ".yml"
           actionlint_files << path if path.realpath.to_s.include?("/.github/workflows/")
         else
-          ruby_files << path if path.tap?
-          shell_files << path if path.realpath == HOMEBREW_BREW_FILE.realpath
+          ruby_files << path
+          shell_files += if [HOMEBREW_PREFIX, HOMEBREW_REPOSITORY].include?(path)
+            shell_scripts
+          else
+            path.glob("**/*.sh")
+                .reject { |path| path.to_s.include?("/vendor/") }
+          end
+          actionlint_files += (path/".github/workflows").glob("*.y{,a}ml")
         end
       end