Floating Point Numbers Not Supported

[SAMBA8695]

Description

The language currently supports only integer literals. Floating point numbers are not recognized by the lexer or handled by the parser, AST, IR, or LLVM backend.

Example unsupported input:

let x = 3.14;

This limits the usefulness of Cow for numeric computation.

Current Behavior

• Lexer recognizes only integer literals
• Decimal numbers are tokenized incorrectly or ignored
• AST supports only integer values
• LLVM output uses only integer (i32) types

Expected Behavior

• Lexer should recognize floating point literals
• Parser should construct AST nodes for floats
• AST and IR should distinguish integer vs floating types
• LLVM backend should emit appropriate float or double instructions

Suggested Direction

• Add TOKEN_FLOAT
• Introduce AST_FLOAT
• Track numeric types during parsing or IR generation
• Emit LLVM float / double instructions as appropriate