Add support for the Sophia programming language

[ifaouibadi]

Add Sophia (.aes) language support

• Introduced new submodule for vscode-sophia and updated .gitmodules
• Added Sophia language definition in languages.yml
• Updated grammars.yml to include Sophia grammar (source.sophia)
• Added sample contracts in samples/Sophia/
• Updated vendor/README.md to document Sophia support
• Added vendor/licenses/git_submodule/vscode-sophia.dep.yml for the grammar submodule (MIT)

Description

This pull request adds Sophia (æternity smart contract language) to Linguist with the primary extension .aes.

Detection: languages.yml registers Sophia as a programming language with tm_scope: source.sophia, ace_mode: text, and color #5319E7.

Syntax highlighting: The TextMate-compatible grammar comes from the MIT-licensed VS Code extension repository mradkov/vscode-sophia, added as vendor/grammars/vscode-sophia via script/add-grammar (and recorded in grammars.yml).

Samples: Two representative .aes files live under samples/Sophia/. They are adapted from the upstream extension’s examples/ tree (MIT); paths and license lines in the samples point to the original sources.

Heuristics: .aes is not currently mapped to any other language in Linguist, so no new heuristic was added.

Note for reviewers: Please confirm usage on GitHub Code Search meets the thresholds in CONTRIBUTING.md (e.g. indexed file counts and spread across repos). If the search query below should be refined (e.g. additional Sophia-specific tokens), maintainer feedback is welcome.

Checklist:

• I am adding a new extension to a language.

• I am adding a new language.

  • The extension of the new language is used in hundreds of repositories on GitHub.com. (Per CONTRIBUTING.md, maintainers expect ~2000+ indexed .aes files in the last year, excluding forks, with reasonable spread across repos—please verify the search link below before merge.)
    • Search results for each extension:
      • https://github.com/search?type=code&q=NOT+is%3Afork+path%3A*.aes+%28entrypoint+OR+contract+OR+%40compiler%29
      • (Optional refinement: add more Sophia-specific tokens if results are too noisy.)
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • https://github.com/mradkov/vscode-sophia/blob/master/examples/FundMe.aes (samples/Sophia/FundMe.aes)
      • https://github.com/mradkov/vscode-sophia/blob/master/examples/Example.aes (samples/Sophia/NamespaceExample.aes, derived from Example.aes)
    • Sample license(s): MIT — vscode-sophia LICENSE
  • I have included a syntax highlighting grammar: https://github.com/mradkov/vscode-sophia
  • I have added a color
    • Hex value: #5319E7
    • Rationale: Distinct purple on the language graph; chosen to read well on light and dark UI; not tied to an official Sophia brand sheet—happy to adjust if maintainers or the æternity/Sophia community prefer a documented brand color.
  • I have updated the heuristics to distinguish my language from others using the same extension. N/A — .aes is not shared with another Linguist language today; no heuristic change.

• I am fixing a misclassified language

• I am changing the source of a syntax highlighting grammar

• I am updating a grammar submodule

• I am adding new or changing current functionality

• I am changing the color associated with a language