The relationship between prompts, plugins, functions, prompt-templates, prompt-rendering, filters, function-advertisement and function-invocation is very complex.
E.g. prompt-templates can be functions, which may be passed directly to the kernel to execute, but could also be advertised as a plugin function, chosen by the LLM and invoked by SK, while using an LLM to execute the function.

We need to document all this, preferably with diagrams that show the relationships between all these parts and with diagrams showing common execution flows.