fix: migrate events to be more inline with svelte 4 (#13362)

* fix: migrate events to be more inline with svelte 4

* fix: use function instead of action

* chore: generate types

* re-export event modifier substitutes

* chore: replace map with object

* fix: handle nullish values

* fix: use bubbler for delegated events

* chore: generate types

* chore: deprecate legacy stuff

* chore: damn type generations

* fix: implement bubble on props strategy

* chore: revert bubble as prop init but keep fix for restProps

* fix: use `passive` and `nonpassive` actions for `passive` and `nonpassive` modifiers

* chore: i swear i will setup a commit hook for generating types

* chore: update output

* tweak passive/nonpassive types to make them more compact and show up as deprecated

* make terminology more consistent with other places

* eat local, shop local, declare local

* unify name replacement stuff

* remove errant newline

* ensure modifier order is stable and matches svelte 4

* fix

* compute indent once

* joining without newlines seems to work better in common cases

* replace passive/nonpassive handlers in situ

* unused

* simplify

* simplify, remove errant spaces

* only import handlers when necessary

* changeset

---------

Co-authored-by: Rich Harris <[email protected]>

Author: paoloricciuti

.changeset/perfect-avocados-greet.md

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+"svelte": patch
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+fix: higher fidelity event migration