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.

* first draft

* refine placeholder logic

bug: inputting and deleting a char on a widget quickly (i think at cursor blink speed) hold the input visually for that blink duration.

needs testing: placeholder specific attrs

* fix conflict with #73

* update placeholder attrs

* small fixes

* fix cursor showing on empty readonly widgets

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Co-authored-by: StaffEngineer <velo.app1@gmail.com>

* 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

* Add text position Left

* Support infinite-line mode

* update readme

* update default mode name

* fix ci

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 >.<

make edit history private; need less re-exports if this is just automagically added

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

feels okay to use, still not 100% on implementation, especially for multistyle texts. works tho

set_text does not respect these limits, unsure of best way to implement them in that function. Think it's object oriented brain biting me here, need to reframe the issue

add sprite bundle click handling to lib.rs

also noticed some more broken things, made a TODO to track them

also break all tests and examples whoooops