Added Berry Language

[Beormund]

Description

Berry is an embedded scripting language designed to run on microcontrollers with limited resources. It is embedded into custom firmware such as Tasmota for ESP32

https://tasmota.github.io/docs/Berry/

Search Results: https://github.com/search?q=extension%3Abe&type=Code.

Berry Source: https://github.com/berry-lang/berry. Berry is released under the MIT License.

Berry Samples: https://github.com/berry-lang/berry/tree/master/examples

Checklist:

• I am adding a new language.
  • The extension of the new language is used in hundreds of repositories on GitHub.com.
    • Search results for each extension:
      • https://github.com/search?utf8=%E2%9C%93&type=Code&ref=searchresults&q=extension%3AFOOBAR+KEYWORDS+NOT+nothack
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • [URL to each sample source, if applicable]
    • Sample license(s):
  • I have included a syntax highlighting grammar: https://github-lightshow.herokuapp.com/
  • I have updated the heuristics to distinguish my language from others using the same extension.

[lildude]

We need a grammar-only repo for the grammar. Please also replace the samples with real-world examples; these appear to all be demonstrations of the various ways of doing things rather than real-world examples.

[Beormund]

I merged your PR as requested. Thank you for your help.

[lildude]

All looks good now.