MR for 2.5.2 feature additions

PyKX 2.5.2 release updates

Converting PyKX generic lists using the keyword parameter raw=True would previously return incorrect results, the values received being the memory address of the individual elements of the list, this has now been resolved

=== "Behaviour prior to change"

        ```python
        >>> a = kx.q('(1; 3.4f; `asad; "asd")')
        >>> a.np(raw=True)
        array([3012581664,      30547, 3012579792,      30547], dtype=uint64)
        ```

=== "Behaviour post change"

        ```python
        >>> a = kx.q('(1; 3.4f; `asad; "asd")')
        >>> a.np(raw=True)
        array([1, 3.4, b'asad', b'asd'], dtype=object)
        ```

Converting PyKX generic lists using the keyword parameter raw=True when explictly required previously would error indicating that the keyword argument was not supplied. This has been resolved with the parameter now appropriately passed to all items

=== "Behaviour prior to change"

        The errors below are truncated for readability

        ```python
        >>> kx.q("(1;2;3;`a;2024.01.01T12:00:00)").py(raw=True)
        TypeError: The q datetime type is deprecated, and can only be accessed ..
        >>> kx.q("(1;2;3;`a;2024.01.01T12:00:00)").np(raw=True)
        TypeError: The q datetime type is deprecated, and can only be accessed ..
        >>> kx.q("(1;2;3;`a;2024.01.01T12:00:00)").pd(raw=True)
        TypeError: The q datetime type is deprecated, and can only be accessed ..
        ```

=== "Behaviour post change"

        ```python
        >>> kx.q("(1;2;3;`a;2024.01.01T12:00:00)").py(raw=True)
        [1, 2, 3, b'a', 8766.5]
        >>> kx.q("(1;2;3;`a;2024.01.01T12:00:00)").np(raw=True)
        array([1, 2, 3, b'a', 8766.5], dtype=object)
        >>> kx.q("(1;2;3;`a;2024.01.01T12:00:00)").pd(raw=True)
        0         1
        1         2
        2         3
        3      b'a'
        4    8766.5
        ```

Use of get method on kx.Table with a str input will now raise a FutureWarning indicating that the return type of this method will change with release 3.0.0. Currently this function returns a kx.Table with a single column, in version 3.0.0 this will return a list/vector containing the content of the column to better align with the Pandas API approach.

```python
>>> import pykx as kx
>>> tab = kx.Table(data={'x': [1, 2, 3], 'y': [2, 3, 4]})
>>> tab.get('x')
/usr/python/3.12/lib/python3.12/site-packages/pykx/pandas_api/pandas_indexing.py:42: FutureWarning:

        Single column retrieval using 'get' method will return a vector/list object in release 3.0+
        To access the vector/list directly use table['column_name']
  warnings.warn("Single column retrieval using 'get' method will a return vector/list object "
pykx.Table(pykx.q('
x
-
0
1
2
'))
>>> tab['x']
pykx.LongVector(pykx.q('1 2 3'))
```

Fix to issue where use of kx.SymbolAtom with __getitem__ method on kx.Table objects would return a table rather then vector/list. The return now mirrors the expected return which matches str type inputs

=== "Behaviour prior to change"

        ```python
        >>> import pykx as kx
        >>> tab = kx.Table(data={'x': [1, 2, 3], 'y': ['a', 'b', 'c']})
        >>> tab['x']
        pykx.LongVector(pykx.q('1 2 3'))
        >>> tab[kx.SymbolAtom('x')]
        pykx.Table(pykx.q('
        x
        -
        1
        2
        3
        '))
        ```

=== "Behaviour post change"

        ```python
        >>> import pykx as kx
        >>> tab = kx.Table(data={'x': [1, 2, 3], 'y': ['a', 'b', 'c']})
        >>> tab['x']
        pykx.LongVector(pykx.q('1 2 3'))
        >>> tab[kx.SymbolAtom('x')]
        pykx.LongVector(pykx.q('1 2 3'))
        ```

Reworked Table.std() method to better handle edge cases relating to mixed columns and nulls. Now matching Pandas results. This addresses issues raised here.
Fix to issue where loading PyKX on Windows from 2.5.0 could result in a users working directory being changed to site-packages/pykx.

KxSystems / pykx

MR for 2.5.2 feature additions #32