Add Veryl language

[dalance]

Add Veryl as a new programming language.

Description

https://veryl-lang.org is a modern hardware description language (HDL) designed as a successor to SystemVerilog. It provides a type-safe syntax, a package manager (Veryl.toml), and a full toolchain (formatter, language server, test runner, documentation generator). Veryl source transpiles to synthesizable SystemVerilog.

Project: https://github.com/veryl-lang/veryl

Note on usage threshold

I'm aware that path:*.veryl (~1.4k) is currently below the 2,000-file threshold. The count has been growing steadily and is likely to cross the threshold in the near future. Given the typical PR review and release cycle, I'm opening this PR a little ahead of time so that detection support can land close to when the threshold is met.

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?type=code&q=NOT+is%3Afork+path%3A*.veryl (~1.4k results)
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • https://github.com/veryl-lang/veryl/blob/master/crates/std/veryl/src/fifo/fifo.veryl
      • https://github.com/veryl-lang/veryl/blob/master/crates/std/veryl/src/fifo/fifo_controller.veryl
    • Sample license(s): Apache-2.0 OR MIT (dual-licensed — see https://github.com/veryl-lang/veryl/blob/master/COPYRIGHT)
  • I have included a syntax highlighting grammar: https://github.com/veryl-lang/veryl (TextMate grammar bundled at https://github.com/veryl-lang/veryl/blob/master/support/vscode/syntaxes/veryl.tmLanguage.json)
  • I have added a color
    • Hex value: #27a357
    • Rationale: The name Veryl is a portmanteau of Verilog and Beryl. Emerald — a variety of beryl — is the language's theme color, hence the bright emerald green
  • [ ] I have updated the heuristics to distinguish my language from others using the same extension. (.veryl is unique to Veryl)