Add RenzMcLang programming language with sample code

[RenzMc]

Adding RenzMcLang programming language support in GitHub Linguist.

• File extensions: .rmc, .renzmc

• Color: #3572A5

• Type: Programming

• Sample files: 13 representative samples included in samples/RenzmcLang folder

• Real-world usage examples:

  • https://github.com/RenzMc/RenzmcLang

  • https://github.com/RenzMc/RenzmcLang/tree/main/examples

  • https://github.com/RenzMc/renzmc-extension/tree/main

  • https://github.com/RenzMc/renzmc-website

  • https://github.com/RenzMc/renzmc-lirik-lagu

• Sample license: MIT

• Rationale: RenzMcLang is an Indonesian-based programming language with unique syntax, actively used in multiple projects. Heuristics were added to distinguish it from other languages using similar extensions.

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