Tksheet

Changed:
- Text now wraps by character by default, can also disable wrapping or wrap by word
- Significant changes to how text is rendered
- Removed mousewheel scrolling lines in header, replaced with vertical axis table scroll
- Resizing row height to text is now based on the existing column width for the cell/cells, includes double click resizing
- Treeview mode `Node` class now uses `str` for parent and `list[str]` for children attributes
- Function `get_nodes()` renamed -> `get_iids()`
- Removed `data_indexes` parameter from `mapping_move...` functions
- Reduce default treeview indent
- `move()` function now returns the same as other move rows functions
- All `Sheet()` functions with an `undo` parameter have been set to `True` by default
- Using `Sheet.set_data()` or `Span`s to set an individual cell's data as `None` will now do so instead of returning
- Setting `show_top_left` during Sheet() initialization will now make the top left rectangle always show

Added:
- Natural sorting functionality [238](https://github.com/ragardner/tksheet/issues/238)
- Treeview mode now works with all normal tksheet functions, including dragging and dropping rows
- Cell text overflow `allow_cell_overflow: bool = False` to adjacent cells for left and right alignments, disabled by default
- Text wrap for table, header and index
python
"" no wrap, "w" word wrap, "c" char wrap
table_wrap: Literal["", "w", "c"] = "c",
index_wrap: Literal["", "w", "c"] = "c",
header_wrap: Literal["", "w", "c"] = "c",


- `tree` parameter to `insert_rows()` function, used internally

Fixed:
- Index fonts now work correctly
- Functions `column_width()` and `row_height()` work correctly for any parameters
- Down sizing rows/columns when scrolled to the end of the axis would result in a rapid movement of row height/column width
- Address [269](https://github.com/ragardner/tksheet/issues/269)

Improved:
- Minor performance improvements for:
- `item_displayed()`
- `show_rows()` / `show_columns()`
- `move()`
- Row insertion

Fixed:
- Error on find within selection without a selection
- Some canvas z fighting issues

Improved:
- Refactored redrawing code

Changed:
- rename Sheet() attr: dropdown_class -> _dropdown_cls

Improved:
- Find within selection performance + memory
- Moving rows/columns performance

Added:
- Built-in find window, use `enable_bindings("find")` to enable
- Escape binding which deselects
- `reverse` parameter to `get_selected_cells()` function

Fixed:
- Not redrawing after Control-space, Shift-space bindings for selecting columns/rows
- Not redrawing after Home, Control/Command-Home bindings for selecting start of the row and start of the table
- Dropdown boxes not reseting y scroll
- Issues with arrow key down
- Arrow key up wrongly moving scroll at row 0

Changed:
- Renamed `vars.py` -> `constants.py`
- Add `_version.py` to `.gitignore`
- `enable_bindings()` with `"find"` now enables an in-built find window which uses the following bindings:
- Control/Command-f/F
- Control/Command-g/G
- Control/Command-Shift-g/G
- Escape
- Return (when the find window has focus)
- Alt/Option-L to find within selection
- Added Escape binding when cell selection is enabled. Pressing Escape will now close the find window if its open, if its not open it will close any open text editor/dropdown box and deselect all cells.

Changed:
- `deselect()` also closes text editor / dropdown

Added:
- Mac OS Zoom in/out bindings
- Control-space, Shift-space bindings for selecting columns/rows if enabled
- Home, Control/Command-Home bindings for selecting start of the row and start of the table

Documentation:
- `bulk_insert()`: wrong example
- Docstrings: return values for `insert()`, `bulk_insert()`

Fixed:
- Wrong type hinting for `Iterator`

Changed:
- `"end_edit_cell"` events for single cell edits e.g. for cell text editor, dropdown box and checkbox edits now have the value **prior** to the edit in the event under keys `cells.table`
- Variables default values in `Sheet()` init have changed from `"inf"` -> `float("inf")`:
- `max_column_width`
- `max_row_height`
- `max_index_width`
- `max_header_height`
- Moved variables from `Sheet.MT` -> `Sheet.ops`:
- `max_column_width`
- `max_row_height`
- `max_index_width`
- `max_header_height`

Fixed:
- Lag on resize index width or header height

Added:
- Ability to set minimum column width: `min_column_width` in `Sheet()` init and `set_options()`