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, 52 deletions

diff --git a/scripts/linters/sorted_dependencies.rb b/scripts/linters/sorted_dependencies.rb
deleted file mode 100644
index f7ae816e..00000000
--- a/scripts/linters/sorted_dependencies.rb
+++ /dev/null
@@ -1,52 +0,0 @@
-def sorted_dependencies(root_dir, excludes = [])
-  pattern = root_dir.join('crates', '*', 'Cargo.toml').to_s
-  errors = Dir.glob(pattern).sort.flat_map do |path|
-    relative = Pathname.new(path).relative_path_from(root_dir).to_s
-    next [] if excludes.include?(relative)
-
-    sections = parse_dep_sections(File.read(path))
-
-    %w[dependencies dev-dependencies].filter_map do |section|
-      deps = sections[section]
-      next if deps.nil? || deps.empty?
-
-      expected = sort_dep_names(deps)
-      next if deps == expected
-
-      { path: relative, section: section, actual: deps, expected: expected }
-    end
-  end
-
-  return true if errors.empty?
-
-  puts 'Found unsorted `[dependencies]` / `[dev-dependencies]` in Cargo.toml.'
-  puts 'Entries must be alphabetical, with `shirabe-*` crates listed before others:'
-  errors.each do |err|
-    puts "  #{err[:path]} [#{err[:section]}]"
-    puts "    actual:   #{err[:actual].join(', ')}"
-    puts "    expected: #{err[:expected].join(', ')}"
-  end
-  false
-end
-
-def parse_dep_sections(content)
-  sections = {}
-  current = nil
-
-  content.each_line do |line|
-    stripped = line.chomp
-    if stripped =~ /\A\s*\[([^\]]+)\]\s*\z/
-      current = $1
-      sections[current] ||= []
-    elsif current && stripped =~ /\A([A-Za-z0-9_-]+)\s*[.=]/
-      sections[current] << $1
-    end
-  end
-
-  sections
-end
-
-def sort_dep_names(deps)
-  shirabe, other = deps.partition { |d| d.start_with?('shirabe-') }
-  shirabe.sort + other.sort
-end