python 支持使用 [] 传入泛型来构建类，添加puerts.generic_method方法，目前只支持静态方法，完善puerts.gen_iterator

[realybin]

from System import Console, Int32, String
from System.Collections.Generic import List__T1

List_T1_Int = List__T1[Int32]
myList = List_T1_Int()

myList.Add(42)
myList.Add(100)
iter = puerts.gen_iterator(myList)

for i in iter:
    Console.WriteLine("Item in myList: " + str(i))

import GenericTest__T1
GenericTest_T1_Int = GenericTest__T1[Int32]

StaticTestMethod_Int32 = puerts.generic_method(GenericTest_T1_Int, 'StaticTestMethod', Int32)
StaticTestMethod_Int32(456)
StaticTestMethod_Int32_Int32 = puerts.generic_method(GenericTest_T1_Int, 'StaticTestMethod', Int32, Int32)
StaticTestMethod_Int32_Int32(789)

import GenericTest2__T2
GenericTest2_Int_String = GenericTest2__T2[Int32, String]
t2 = GenericTest2_Int_String()

public class GenericTest2<T1, T2>
{
    public GenericTest2()
    {
        Console.WriteLine("GenericTest2 constructor called with types: " + typeof(T1).Name + ", " + typeof(T2).Name);
    }
}

public class GenericTest<T1>
{
    public T? TestMethod<T>(int param)
    {
        Console.WriteLine("GenericTest.TestMethod called with type: " + typeof(T).Name + " and value: " + param);
        return default(T);
    }
    
    public static T StaticTestMethod<T>(int param)
    {
        Console.WriteLine("GenericTest.StaticTestMethod called with type: " + typeof(T).Name + " and value: " + param);
        return default(T);
    }
    public static T1 StaticTestMethod<T1, T2>(int param)
    {
        Console.WriteLine("GenericTest.StaticTestMethod called with type: " + typeof(T1).Name + ", " + typeof(T2).Name + " and value: " + param);
        return default(T1);
    }
}