add template command

[jqnatividad]

For each row in a CSV, fill out a specified minijinja template with corresponding columns, and send the output to a file, whose filename can also be dynamically generated using CSV data.

Extend the minijinja template with the ability to execute qsv's Luau DSL so we can do additional stuff like complex expressions, lookups, conditional filtering and dynamic content while populating a template.

Use minijinja crate - https://github.com/mitsuhiko/minijinja#readme

[ondohotola]

Currently I can't compile as it requires rust 1.73 and the Mac/Homebrew only has 1.72. el

[github-actions]

Stale issue message

[jqnatividad]

The template command can also be used to fill out a DCAT3 metadata profile.