Document `init.janet` for `import`. about janet-lang.org HOT 2 OPEN

Although there is mention of init.janet at https://janet-lang.org/docs/modules.html, reading the text there didn't lead me to deduce the current behavior.

For reference, I think a relevant line of source in boot.janet is this one:

(module/add-paths "/init.janet" :source)

May be this section of the website docs would be a good place to mention behavior with respect to init.janet.

from janet-lang.org.

If something is going to be added to the website docs about /init.janet, may be it makes sense to mention the other items that are searched for (and the order as well).

IIUC, for (import foo), at least four things might be looked for in the following order:

1. foo.jimage
2. foo.janet
3. foo/init.janet
4. foo.<native-extension>

(Here, <native-extension> is likely to be .so on a Linux machine or .dll on Windows.)

I think the search is done in the above order and the first match "wins". That is, once a match is found, the search ends and an attempt is made to "import" the matched item.

For reference, here are some relevant-looking lines from boot.janet.

from janet-lang.org.