Prompt to import external files

[pablogila]

Is your feature request related to a problem? Please describe.

The function tp.system.prompt() prompts the user for a text string. This complicates importing long strings of text, such as JSON files with a lot of content.

Describe the solution you'd like

It would make a lot of sense to have an option to prompt for a (text-based) file, so that the user could drag and drop or open a file in the explorer. It should have the same effect as manually copying the content of the file with the current prompt function.

Describe alternatives you've considered

I am trying to import my kindle highlights with Templater to customise the output. I previously tried the obsidian kindle plugin, which lets the user drag and drop a text file to be processed. This can not be achieved with the current version of Templater, where the text content must be manually copied into the prompt box.