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, 57 deletions

diff --git a/scripts/linters/no_use_as_alias.rb b/scripts/linters/no_use_as_alias.rb
deleted file mode 100644
index 8e0c86b3..00000000
--- a/scripts/linters/no_use_as_alias.rb
+++ /dev/null
@@ -1,57 +0,0 @@
-def no_use_as_alias(root_dir, excludes = [])
-  pattern = root_dir.join('crates', '**', '*.rs').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)
-
-    find_use_aliases(path, relative)
-  end
-
-  return true if errors.empty?
-
-  puts 'Found `use ... as name` aliases.'
-  puts 'Aliasing imports merely to shorten a namespace is forbidden.'
-  puts 'Only `as _` (e.g. `use std::io::Write as _;`) and PascalCase renames'
-  puts '(for collision avoidance, e.g. `use foo::Error as FooError;`) are allowed:'
-  errors.each do |err|
-    puts "  #{err}"
-  end
-  false
-end
-
-USE_ALIAS_START_RE = /\A(?:pub(?:\([^)]*\))?\s+)?use\b/
-PASCAL_CASE_RE = /\A[A-Z][A-Za-z0-9]*\z/
-
-def find_use_aliases(path, relative)
-  errors = []
-  in_use = false
-  brace_depth = 0
-
-  File.readlines(path).each_with_index do |raw, idx|
-    code = raw.split('//', 2).first || raw
-    stripped = code.strip
-
-    unless in_use
-      next unless stripped =~ USE_ALIAS_START_RE
-
-      in_use = true
-      brace_depth = 0
-    end
-
-    code.scan(/\bas\s+([A-Za-z_][A-Za-z0-9_]*)/) do |m|
-      name = m[0]
-      next if name == '_'
-      next if name =~ PASCAL_CASE_RE
-
-      errors << "#{relative}:#{idx + 1}: `as #{name}` aliasing in `use` statement"
-    end
-
-    brace_depth += code.count('{') - code.count('}')
-    if brace_depth <= 0 && code.rstrip.end_with?(';')
-      in_use = false
-      brace_depth = 0
-    end
-  end
-
-  errors
-end