fix(parser): preserve numeric variable types (#85)

[jefyokta]

Description

Fixes #85.

Numeric variables were being converted to php::Var when native_types was not enabled. This allowed variables initially inferred as numeric types to be reassigned to incompatible types.

For example:

$x = 42;
$x = [1, 2];

Previously, this was allowed because $x was converted to php::Var.

This change preserves the inferred numeric type by default, making its behavior consistent with other inferred types such as string, array, and object.

The reassignment above will now be rejected because $x is inferred as php::Int.

Expected behavior

$x = 42;
$x = [1, 2]; // Error

native_types should no longer be required to strictly preserve the inferred numeric type.

Implementation

The change is made in getNativeType():

protected function getNativeType(string $type): string
{
    if ($type === Type::INT && $this->bigintTypes) {
        return Type::BIGINT;
    }
    if ($type === Type::FLOAT && $this->decimalTypes) {
        return Type::DECIMAL;
    }
    //-  return $this->nativeTypes ? $type : Type::VAR;
     return $type;
}

This method is only called once, so changing this behavior does not introduce additional conversion paths or require broader changes to the type inference logic. the only one line that call it:

typephp/src/Parser/AssignOpTrait.php

Lines 650 to 652 in 87c7eda

	$finalVarType = $this->getNormalAssignType($type);
	$finalVarType = $this->isNativeType($finalVarType) ? $this->getNativeType($finalVarType) : $finalVarType;
	$this->addLocalVar($var, $finalVarType);

If the intended design is that strict numeric type inference should explicitly require native_types, this PR can be rejected accordingly.

[jefyokta]

i forgot to test to build tpc with the new tpc, anyway $target convertion problem already fixed, but got incompetible with ForeachIterator's phpx.
ForeachIterator::nextKeyValue doesnt exists in phpx v2.7.0? i found it the in master branch, but not in release

error: no member named 'nextKeyValue' in 'php::ForeachIterator'
   28 |         while (tmp_var_0.nextKeyValue(key, value)) {
      |                ~~~~~~~~~ ^
1 error generated.
Fatal error: compile failed:
#0 [internal function]: TypePhp\Diagnostics\CliDiagnostic

https://github.com/swoole/phpx/blob/f5663b75c313d817680d26fcae021d67ef32e4f6/include/phpx.h#L2680