* feat(textarea): add native cursor render mode
- Add CursorRenderMode::{Cell, Hidden} and TextArea accessors for render mode plus rendered_cursor_position().
- Store the terminal-relative cursor position from a shared render plan that accounts for blocks, line numbers, scroll, wrapping, tabs, and wide Unicode.
- Let hidden mode suppress only the textarea-owned cursor cell while preserving default Cell rendering and set_cursor_style behavior.
- Document native cursor integration and add focused tests for default rendering, hidden rendering, placeholders, and cursor-position edge cases.
* chore: prepare 0.12.1 release
* feat(textarea): add bulk replace API and transparent measure() caching
- add TextArea::set_lines(lines, cursor) for direct whole-buffer replacement
- preserve widget configuration while resetting history, selection, highlights, viewport scroll, and cached measurement state
- cache measure(width_cols) results by outer width and reuse them until dependencies change
- invalidate cached measurement on content edits, undo/redo, and measure-affecting setters
- add focused tests for set_lines behavior and cache correctness
* chore(release): bump to v0.10.2 and refresh docs
- prepare the v0.10.2 release with updated crate version and changelog entry
- refresh README coverage for fork-added APIs including wrapping, measurement, bulk replace, and custom highlights
* select, second go using new multiline code
* implemented internal delete_str, added tests
* delete_str_internal must not put non deleted strings into history. Ie ctrlc should not change history
* delete_str was taking lines out in the non delete case
* corrected comment
* fixes after feedback. Plus multichar bugs. change modal sample
