v0.8.3 - Transpiler Critical Fixes

[alaa-eddine]

Fixed

• Scientific Notation Parsing: Fixed Pine Script lexer to correctly parse scientific notation literals (e.g., 10e10, 1.2e-5, 1E+5). Previously, these were incorrectly tokenized as separate tokens, causing syntax errors in transpiled code.
• Namespace Function Calls in Return Statements: Fixed critical bug where namespace function calls (e.g., math.max(), ta.sma()) in single-expression return statements were incorrectly transpiled with double parentheses (e.g., math.max()()), resulting in runtime errors. Removed redundant AST traversal in transformReturnStatement.