FR: Template insertion support for Canvas cards

[greetclammy]

Is your feature request related to a problem?
Cannot insert templates into Canvas cards due to "Templater error: No active editor" error. Forces creation of separate notes just to use templates within Canvas, unnecessarily cluttering vault.

Describe the solution you'd like
Add proper editor detection for Canvas cards, allowing direct template insertion similar to regular notes. Should seamlessly work when selecting a card and triggering a template.

Describe alternatives you've considered
Current workaround: Create temporary note → run template → copy content → paste into Canvas card → delete temporary note. Inefficient and disrupts workflow.

Additional context
Canvas cards use different editor instances than markdown notes. Integration would require detecting these specialized editor instances. Critical feature for users who heavily utilize Canvas in their workflow.