adds a `CosmicCanvas` component to hold the image cosmic draws to. allows easier interop between UI and Sprite widgets

Each type of widget now uses a single `CosmicEditBundle`, adding widget specific components with `.insert()` or as tuples.

* text cursor hover example

* move cursor modify fns to src

caveats:
 - only hides cursor when typing if cursor is in app window
 - only acts on primary window

* add config for cursor changes

cursor hide does not work on WASM

* Update src/cursor.rs

Co-authored-by: StaffEngineer <111751109+StaffEngineer@users.noreply.github.com>

* fix focus handling in cursor.rs

* Update src/lib.rs

Co-authored-by: StaffEngineer <111751109+StaffEngineer@users.noreply.github.com>

* add none | events | default options for cursor

* stop sprites sending hover events per frame

* commit missed example

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Co-authored-by: StaffEngineer <111751109+StaffEngineer@users.noreply.github.com>

* rewrite `draw_pixel`

causes overlayed text to appear correctly blended

Breaking Changes:
 - CosmicEdit*Bundle::background_color renamed to fill_color, and takes a new `FillColor(pub Color)`

* fix clippy

* Add text position Left

* Support infinite-line mode

* update readme

* update default mode name

* Add auto-height mode, refactoring

* Clippy

should allow a user to install and use the plugin without needing their own install of cosmic-text

the violet color changed slightly when i set all the colors to bevy colors >.<

removes CosmicEditor::set_text in favor of a set_text CosmicText component

add sprite bundle click handling to lib.rs