This also allows to assign a spell to multiple spell groups, which is the case for many spells in
the SRD.
Additionally, this makes many small improvements and fixes to the provided spell compendium.
In the Active Effect Config, there are now additional inputs to configure the effect
to be applied to items owned by the actor instead of the actor itself. It is possible
to select the items to which to apply the effect via matching by name, or via a condition
expression, that provides similar capabilities as the evaluation of mathematical
expressions in rolls. Data from the Actor, Item, and Active Effect can be accessed
similar to how properties are accessed in roll formulas (using the prefixes `@actor`,
`@item`, and `@effect`). For example, in order to apply an effect to all ranged
weapons, the conditions would be
```js
'@item.type' === 'weapon' && '@item.data.attackType' === 'ranged'
```
