refactor: Move Linter::url and Linter::name generation to proc macro

This lets us get rid of the build.rs script and results
in more developer-friendly compile error messages.

scripts/add_plugin.py

@@ -84,7 +84,8 @@ mod tests {
                 fp.write(f"{indent}// {plugin}")
                 fp.write("\n")
 
-            elif line.strip() == '#[prefix = "RUF"]':
+            elif line.strip() == '/// Ruff-specific rules':
+                fp.write(f"/// [{plugin}]({url})\n")
                 fp.write(f'{indent}#[prefix = "{prefix_code}"]\n')
                 fp.write(f"{indent}{pascal_case(plugin)},")
                 fp.write("\n")