Make WP Codebox component adapters generic

[chubes4]

Summary

• Removes built-in Homeboy-shaped parent request normalization from generic WP Codebox; callers must normalize external request shapes through wp_codebox_normalize_parent_task_request or pass the generic runner contract directly.
• Replaces fixed component-name/path assumptions with caller-declared component_contracts and wp_codebox_component_contracts for host and browser runtimes.
• Deletes legacy component path inputs and defaults, including agents_api_path, data_machine_path, data_machine_code_path, runtime_component_paths, wp_codebox_component_paths, and the legacy adapter gates.

Testing

• php tests/smoke-wordpress-plugin.php
• npm run build
• npm run agent-task-run-runtime-components-smoke
• npm run recipe-staged-files-smoke
• php -l packages/wordpress-plugin/src/class-wp-codebox-agent-sandbox-runner.php && php -l packages/wordpress-plugin/src/trait-wp-codebox-abilities-browser-runtime.php && php -l packages/wordpress-plugin/src/trait-wp-codebox-abilities-execution.php && php -l packages/wordpress-plugin/src/trait-wp-codebox-abilities-schemas.php && php -l packages/wordpress-plugin/src/trait-wp-codebox-abilities-agents-api-executors.php && php -l tests/smoke-wordpress-plugin.php

Notes

• npm run check was started in an earlier pass and completed several check-group smokes, including build, WordPress plugin smoke, browser runtime operation smoke, package distribution smoke, external adapter smoke, and multiple runtime/recipe smokes. It was interrupted by user abort during recipe-staged-files-smoke; that interrupted smoke was rerun directly and passed.
• A focused grep confirms tracked source/docs no longer reference the deleted legacy field/option names: homeboy/wp-codebox, wp_codebox_component_paths, agents_api_path, data_machine_path, data_machine_code_path, runtime_component_paths, legacy_component, or wp_codebox_enable_legacy.

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (openai/gpt-5.5)
• Used for: Drafting and implementing the generic component adapter changes, deleting legacy compatibility paths, updating smoke coverage/docs, and running verification. Chris remains responsible for review and merge.

Fixes #768