feat: Migrate SAL to Cargo workspace

- Migrate individual modules to independent crates
- Refactor dependencies for improved modularity
- Update build system and testing infrastructure
- Update documentation to reflect new structure

text/tests/text_indentation_tests.rs

@@ -106,7 +106,7 @@ fn test_dedent_and_prefix_combination() {
     let indented = "    def function():\n        print('hello')\n        return True";
     let dedented = dedent(indented);
     let prefixed = prefix(&dedented, ">>> ");
-    
+
     let expected = ">>> def function():\n>>>     print('hello')\n>>>     return True";
     assert_eq!(prefixed, expected);
 }
@@ -120,7 +120,7 @@ fn test_dedent_real_code_example() {
             return result
         else:
             return None"#;
-    
+
     let dedented = dedent(code);
     let expected = "\nif condition:\n    for item in items:\n        process(item)\n    return result\nelse:\n    return None";
     assert_eq!(dedented, expected);