Rename {% component %} Template Tag to Avoid Generic Naming

[davecoates]

The current template tag {% component "ComponentName" %} used for rendering React components is too generic. The term "component" is broadly used in many contexts, leading to potential confusion. For example, the library django-components uses a tag called component. I think the idea presented in that library is useful and while we may not necessarily use it specifically I can see us adopting something like it for encapsulating re-usable django template based components (that may themselves use a React component).

To make it clear that this tag is specifically for React components, I propose renaming it to {% react_component %} or similar.