Add language: Tact, and extension to JSON

[novusnota]

Adding a Tact programming language for .tact file extension and an extension to JSON under .tact. More about the former: https://tact-lang.org/

Description

Tact is a new programming language for TON blockchain smart contracts that is easy to use and has a familiar syntax, strong type system, gas control and zero-overhead type composition, which enables developers to write complex smart contract systems with verified execution costs.

Checklist:

• I am adding a new language. — Tact

  • The extension of the new language is not yet used in hundreds of repositories on GitHub.com, although it's getting there.
    • Search results for each extension:
      • .tact search query, excluding forks & misc., see additional info below
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • jetton.tact is adapted from Jetton Standard in tact-lang/tact-by-example
      • deployable_trait.tact is adapted from Deployable Trait in tact-lang/tact-by-example
    • Sample license(s): MIT License
  • I have included a syntax highlighting grammar: tact-lang/tact-vscode
  • I have added a color
    • Hex value: #48b5ff
    • Rationale: Brand color of the language.
  • I have updated the heuristics to distinguish my language from others using the same extension.

• I am adding a new extension to a language. — JSON, but written under .tact format

  • The new extension is used in hundreds of repositories on GitHub.com
    • Search results for each extension:
      • .tact, but with JSON written to it (~5.1k files at the moment)
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • landing.tact is copied from DSprtn/GTFO_VR_Plugin
    • Sample license(s): MIT License
  • I have included a change to the heuristics to distinguish my language from others using the same extension.

Additional info

In the search query I've excluded forks and some smaller JSON-like file format used by the specific haptics company, which happens to have the same file extension (not listed in languages.yml). However, I've done a bit of research and the JSON-like .tact format is just regular JSON, so I've added a heuristic to differentiate them and an extension of JSON with a sample JSON .tact file.

Currently, the former query gives approximately 1.1k rightful .tact files across a fair distribution of repositories, although still falling short of the 2k mark. Please, add the Pending Popularity label :)

On other note — in addition to the TextMate grammar submitted with this PR, the language as of now also has a complete and well-tested Tree-sitter grammar. Could you please help integrate it to GitHub once or when this PR gets merged?

[lildude]

🤔 your search result suggests there are more non-Tact files than there are Tact files which means they're all going to be misidentified once this PR merged. In such cases we recommend both languages be identified and added in the same PR.

On other note — in addition to the TextMate grammar submitted with this PR, the language as of now also has a complete and well-tested Tree-sitter grammar. Could you please help integrate it to GitHub once or when this PR gets merged?

This is out of my control and is entirely up to the team that controls the highlighting engine. Given the low usage, this is unlikely to happen any time soon.

[novusnota]

Got it, thanks for the clarification. I did some research on that non-Tact language and turns out it's just JSON. So I've added it as a new extension for JSON and also provided a heuristic to differentiate them, relevant test and samples. Hope it's done correct :)