Fix PHPCS/WPCS violations and add missing docblocks

[miyanialkesh7]

Summary

• Auto-fixed 161 mechanical PHPCS/WPCS violations (tabs-vs-spaces indentation, doc-comment alignment, missing end-of-file newline) via phpcbf — no logic changes.
• Added missing file, class, and method docblocks to Plugin_Paths, Register_Blocks, and Enqueues, and to both block render.php templates.
• Added phpcs:ignore with an explanatory comment on two false-positive WordPress.Security.EscapeOutput.OutputNotEscaped findings — get_block_wrapper_attributes() and wp_interactivity_data_wp_context() both already escape their own output; re-escaping would corrupt the HTML attributes they emit.
• Renamed the unprefixed local $unique_id to $advanced_multi_block_unique_id in toggle/render.php to satisfy WordPress.NamingConventions.PrefixAllGlobals.
• Excluded WordPress.Files.FileName.* sniffs in phpcs.xml.dist with a comment explaining why: this plugin intentionally uses namespaced classes autoloaded via Composer's PSR-4, so filenames match class names rather than the classic class-{name}.php convention — enforcing that sniff would fight the plugin's own architecture.

Result

composer run lint (phpcs): 127 errors / 59 warnings → 0 errors / 0 warnings

Test Plan

• php -l passes on all 7 touched files
• composer run lint reports 0 errors, 0 warnings
• Manual diff review confirms zero behavioral changes — whitespace, docblocks, comments, and one local variable rename only