feat: add arrays

examples/04_loops.styve

examples/06_arrays_and_looping.styve

src/frontend/ast/ASTPrettyPrinter.java

src/frontend/ast/ArrayLiteral.java

src/frontend/ast/CallExpr.java

src/frontend/ast/NumericLiteral.java

src/frontend/lexer/CodeReconstructor.java

src/frontend/lexer/Lexer.java

src/frontend/lexer/TokenType.java

src/frontend/parser/Parser.java

src/runtime/Interpreter.java

src/runtime/environment/Environment.java

src/runtime/eval/Expressions.java

src/runtime/values/RTArrayVal.java

src/runtime/values/RTNativeAbstractObject.java

src/runtime/values/rtValueType.java