Create new CollectionEntry class and add lifecycle hooks to Collections API

[sebnitu]

What changed?

The primary goal of this PR is to introduce the new CollectionEntry class used as the prototype of collection entries. This also introduces some new Collection API lifecycle hooks for both the root component (extended from Collection) and entries (extended from CollectionEntry).

New API

• applySettings() (collection and entry) method that allows passing a configuration object to settings.
• createEntry() (collection) method that returns an instantiation of the CollectionEntry class.

Lifecycle Hooks

Lifecycle hooks are applied using a new helper lifecycleHooks and is applied to mount/unmount and register/deregister actions. The following are the lifecycle hooks and the order that they are called:

On Mount:

• beforeMount
• entry.mount
  • entry.beforeMount
  • entry.afterMount
• beforeRegister
• entry.beforeRegister
• Entry is added to collection.
• entry.afterRegister
• afterRegister
• afterMount

On Unmount:

• beforeUnmount
• entry.unmount
  • entry.beforeUnmount
  • entry.afterUnmount
• beforeDeregister
• entry.beforeDeregister
• Entry is removed from collection.
• entry.afterDeregister
• afterDeregister
• afterUnmount

Additional changes

• Core modules have been refactored and organized in a more logic way (utilities, helpers, etc).
• Removed registerCollection
• Removed deregisterCollection
• getCustomProps now takes a collection entry as an argument.
• getElement now returns null in final case.
• transition no longer handles custom property fetching and instead requires some number value as the duration argument.
• Added toMilliseconds which converts a string or number to milliseconds if possible.
• Renamed updateGlobalState to setGlobalState.
• All three component settings have been changed in the following ways:
  • Renamed selector[Component] to selector
  • Removed eventListeners
• Close methods have been refactored to take id strings instead of optionally an HTML element or collections entry.
• Renamed popover.cleanup() to popover.floatingCleanup()
• Moved popover handleDocumentClick call into the open() function in an event type conditional.