feat: wrapped line cursor navigation (#15)

* feat(cursor): add Up/Down navigation between wrapped visual lines

- Extend CursorMove::next_cursor() with optional wrapped rows parameter so Up/Down use visual row indices when wrapping is active
- Compute wrapped rows in move_cursor_with_shift() and pass them through
- Fix cursor_at_visual_row() boundary clamping for non-last wrapped segments to prevent the cursor landing on the next visual line
- Preserve visual column offset when moving between wrapped rows so the cursor moves straight vertically instead of jumping to row start/end

* chore(release): bump to v0.10.1 and update changelog

Cargo.toml

@@ -3,7 +3,7 @@ name = "tui-textarea-2"
 homepage = "https://github.com/srothgan/tui-textarea#readme"
 repository = "https://github.com/srothgan/tui-textarea"
 documentation = "https://docs.rs/tui-textarea-2/latest/tui_textarea/"
-version = "0.10.0"
+version = "0.10.1"
 edition = "2024"
 rust-version = "1.85.0" # for Rust 2024 edition support
 authors = ["Simon Peter Rothgang <simonrothgang@icloud.com>", "rhysd <lin90162@yahoo.co.jp>"]