Warning/error if import, include, extends or embeds file is not found

[ogrammer]

It would be nice if I extends for example templt.peb and it tells me that it does not exist. I think an error would be the best way. (Sorry for creating so many issues, found an old list I had made.)

[bjansen]

Sorry for creating so many issues

I'm kidding, thanks for taking the time to report them :)

[bjansen]

I'd prefer a warning instead of an error, because depending on which com.mitchellbosecke.pebble.loader.Loader is actually used at runtime, the IDE might not be able to locate templates correctly.

If the loader loads templates from a database for example, the IDE will report false positives everywhere. Same thing with loaders configured with non-empty prefixes and suffixes.