refactor(lint): rewrite structural linters from Ruby to PHP

Fold scripts/lint and scripts/linters/*.rb into a standalone Composer
project under scripts/linters/, matching the scripts/plugin-class-classifier/
convention. Uses no external packages, only PHP + Composer autoloading.

Verified byte-for-byte identical output against the original Ruby
implementation, both on the current repo (all linters pass) and on a
synthetic fixture exercising every violation type.

Entry point moves from `scripts/lint` to `scripts/linters/lint`.

1 files changed, 0 insertions, 27 deletions

diff --git a/scripts/linters/no_format_trailing_comma.rb b/scripts/linters/no_format_trailing_comma.rb
deleted file mode 100644
index 3e474a76..00000000
--- a/scripts/linters/no_format_trailing_comma.rb
+++ /dev/null
@@ -1,27 +0,0 @@
-def no_format_trailing_comma(root_dir, excludes = [])
-  crates_dir = root_dir.join('crates')
-  raw = `grep -rn --include='*.rs' -e ',)' #{crates_dir}`
-
-  errors = []
-  raw.each_line do |line|
-    line = line.chomp
-    path, lineno, content = line.split(':', 3)
-    next if content.nil?
-
-    relative = Pathname.new(path).relative_path_from(root_dir).to_s
-    next if excludes.include?(relative)
-
-    # `(,)` is a macro repetition fragment (e.g. `$(,)?`).
-    next if content.match?(/\(,\)/)
-
-    errors << "#{relative}:#{lineno}: trailing `,)` before a closing paren"
-  end
-
-  return true if errors.empty?
-
-  puts 'Found `,)` introduced by formatting. Remove it.'
-  errors.each do |err|
-    puts "  #{err}"
-  end
-  false
-end