* build: enable consistent type imports eslint rule
* change to warn
* fix the warning in example and excalidraw-app
* fix packages
* enable type annotations and throw error for the rule
* Introducing fractional indices as part of `element.index`
* Ensuring invalid fractional indices are always synchronized with the array order
* Simplifying reconciliation based on the fractional indices
* Moving reconciliation inside the `@excalidraw/excalidraw` package
---------
Co-authored-by: Marcel Mraz <marcel@excalidraw.com>
Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>
Aakansha Doshi