chore(lint): add Ruby linter scripts and apply rules

Adds scripts/lint with linters for mod.rs naming, contiguous use blocks,
use-as aliasing, sorted Cargo dependencies, std::collections maps, and
workspace dependency requirements. Renames mod.rs files, reorders use
statements, drops unnecessary import aliases, and sorts Cargo.toml
entries to satisfy the new rules.

1 files changed, 34 insertions, 0 deletions

diff --git a/scripts/linters/no_decorative_section_comment.rb b/scripts/linters/no_decorative_section_comment.rb
new file mode 100644
index 0000000..8f26fad
--- /dev/null
+++ b/scripts/linters/no_decorative_section_comment.rb
@@ -0,0 +1,34 @@
+def no_decorative_section_comment(root_dir)
+  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
+    find_decorative_comments(path, relative)
+  end
+
+  return true if errors.empty?
+
+  puts 'Found decorative section comments (4+ consecutive `=`, `-`, or Unicode box-drawing characters).'
+  puts 'These section dividers are unnecessarily noisy — remove them:'
+  errors.each do |err|
+    puts "  #{err}"
+  end
+  false
+end
+
+DECORATIVE_RUN_RE = /[-=]{4,}|[─-╿]{4,}/
+
+def find_decorative_comments(path, relative)
+  errors = []
+
+  File.readlines(path).each_with_index do |raw, idx|
+    stripped = raw.lstrip
+    next unless stripped.start_with?('//')
+    next if stripped.start_with?('///') || stripped.start_with?('//!')
+
+    next unless stripped.match?(DECORATIVE_RUN_RE)
+
+    errors << "#{relative}:#{idx + 1}: decorative section comment"
+  end
+
+  errors
+end