[FEATURE] date replacement in markdown

[gphorvath]

Story

As a prompt engineer,
I want my prompts to contain today's date,
so that LLM responses have the appropriate context.

Proposed Solution

Replace {{.Date}} with today's date when using a prompt.

Alternatives Considered

Provide a clear description of any alternative solutions or features you've considered.

Additional Context

Add any other context or screenshots about the feature request here.