Allow opt-out of template/directory data files

[Zearin]

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

I'm porting a personal project that makes heavy use of a data directory. In my old setup, I had already arranged my data into a hierarchical set of folders and files. I already had the data hierarchy exactly as I wanted it by simply importing (or require-ing) the top-level index.js file.

Although I think Eleventy’s built-in feature to construct the data hierarchy based on nested folders is a cool feature, I want to turn it off for this particular project. The data is now bloated with lots and lots of duplicates, and the hierarchy I had previously constructed now requires me to insert a lot of .index. everywhere («something».index.«something»), because I used the standard practice of using index files as the default place for importing data in each subdirectory.

Describe the solution you'd like

I want a boolean option in Eleventy’s configuration that allows me to turn off Eleventy’s automatic data-hierarchy feature.

[zachleat]

Specifically, you mean this feature right? https://www.11ty.dev/docs/data-template-dir/

[zachleat]

This repository is now using lodash style issue management for enhancements. This means enhancement issues will now be closed instead of leaving them open.

View the enhancement backlog here. Don’t forget to upvote the top comment with 👍!

[zachleat]

This is implemented with #1699, pending docs issue #2681

2.0.0-canary.19