Add IntelliJ IntelliSense Support for Bottle Templates

Hi,

First of all, I would like to say thank you for Bottle. It is amazing software.

I would also like to mention that Bottle has a great, simple templating engine. Unfortunately, the lack of IntelliSense support in IntelliJ is a major issue. In practice, this makes it difficult to use in any larger project.

I have tried Jinja templates as well. IntelliJ support for Jinja is also quite limited, although at least there is some support. However, in my opinion, Jinja is messy.

I cannot help with implementing a plugin myself, so I am just mentioning this here in the hope that maybe, one day, someone will create one.

What is amazing is that I have not found any other issues with Bottle. No glitches, no bugs, nothing problematic. It is great software.