feat: Add Phase 1 languages (Bash, C, C++, C#, COBOL) to CodeLang (#271)

Add support for five high-priority programming languages to Data Designer's
code generation capabilities:

- **Bash**: Universal DevOps and automation scripting
- **C, C++, C#**: Systems programming and enterprise development
- **COBOL**: Legacy mainframe systems and modernization

These languages address critical enterprise use cases including legacy code
maintenance, systems programming, and infrastructure automation.

Changes:
- Add new CodeLang enum values for bash, c, cpp, csharp, cobol
- Update code_lang_to_syntax_lexer() with Pygments lexer mappings
- Update documentation to reflect new supported languages
- Update tests to account for 21 total supported languages (up from 16)

Co-authored-by: Johnny Greco <jogreco@nvidia.com>

Author: kirit93

docs/concepts/columns.md

@@ -45,7 +45,7 @@ Use **Jinja2 templating** in prompts to reference other columns. Data Designer a
 
 LLM-Code columns generate code in specific programming languages. They handle the prompting and parsing necessary to extract clean code from the LLM's response—automatically detecting and extracting code from markdown blocks. You provide the prompt and choose the model; the column handles the extraction.
 
-Supported languages: **Python, JavaScript, TypeScript, Java, Kotlin, Go, Rust, Ruby, Scala, Swift**, plus **SQL** dialects (SQLite, PostgreSQL, MySQL, T-SQL, BigQuery, ANSI SQL).
+Supported languages: **Bash, C, C++, C#, COBOL, Go, Java, JavaScript, Kotlin, Python, Ruby, Rust, Scala, Swift, TypeScript**, plus **SQL** dialects (SQLite, PostgreSQL, MySQL, T-SQL, BigQuery, ANSI SQL).
 
 ### 🗂️ LLM-Structured Columns
 

packages/data-designer-config/src/data_designer/config/utils/code_lang.py

@@ -7,9 +7,14 @@
 
 
 class CodeLang(str, Enum):
+    BASH = "bash"
+    C = "c"
+    COBOL = "cobol"
+    CPP = "cpp"
+    CSHARP = "csharp"
     GO = "go"
-    JAVASCRIPT = "javascript"
     JAVA = "java"
+    JAVASCRIPT = "javascript"
     KOTLIN = "kotlin"
     PYTHON = "python"
     RUBY = "ruby"
@@ -63,15 +68,21 @@ def code_lang_to_syntax_lexer(code_lang: CodeLang | str) -> str:
     Reference: https://pygments.org/docs/lexers/
     """
     code_lang_to_lexer = {
+        CodeLang.BASH: "bash",
+        CodeLang.C: "c",
+        CodeLang.COBOL: "cobol",
+        CodeLang.CPP: "cpp",
+        CodeLang.CSHARP: "csharp",
         CodeLang.GO: "golang",
-        CodeLang.JAVASCRIPT: "javascript",
         CodeLang.JAVA: "java",
+        CodeLang.JAVASCRIPT: "javascript",
         CodeLang.KOTLIN: "kotlin",
         CodeLang.PYTHON: "python",
         CodeLang.RUBY: "ruby",
         CodeLang.RUST: "rust",
         CodeLang.SCALA: "scala",
         CodeLang.SWIFT: "swift",
+        CodeLang.TYPESCRIPT: "typescript",
         CodeLang.SQL_SQLITE: "sql",
         CodeLang.SQL_ANSI: "sql",
         CodeLang.SQL_TSQL: "tsql",

packages/data-designer-config/tests/config/utils/test_code_lang.py

@@ -26,7 +26,7 @@ def test_parse_dialect():
 
 
 def test_supported_values():
-    assert len(CodeLang.supported_values()) == 16
+    assert len(CodeLang.supported_values()) == 21
 
 
 def test_code_lang_to_syntax_lexer():