feat: add plugin dependency pipeline and HTML rendering service

- Implemented a new dependency pipeline for plugins to manage Python package dependencies, including conflict detection and automatic installation of missing dependencies.
- Introduced an HTML rendering service that utilizes existing browsers to render HTML content as PNG images, with support for various configurations and error handling.

src/plugin_runtime/capabilities/__init__.py

@@ -1,9 +1,11 @@
 from .components import RuntimeComponentCapabilityMixin
 from .core import RuntimeCoreCapabilityMixin
 from .data import RuntimeDataCapabilityMixin
+from .render import RuntimeRenderCapabilityMixin
 
 __all__ = [
     "RuntimeComponentCapabilityMixin",
     "RuntimeCoreCapabilityMixin",
     "RuntimeDataCapabilityMixin",
+    "RuntimeRenderCapabilityMixin",
 ]