feat: add functionality to apply Active Affects to owned Items

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'
```

scss/ds4.scss

@@ -9,6 +9,7 @@
 // global
 @use "global/accessibility";
 @use "global/fonts";
+@use "global/utils";
 
 // shared
 @use "components/shared/add_button";

scss/global/_utils.scss

@@ -0,0 +1,14 @@
+/*
+ * SPDX-FileCopyrightText: 2022 Johannes Loher
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+.ds4-code-input {
+    font-family: var(--font-mono);
+}
+
+// This is needed for higher specifity
+form .ds4-code-input {
+    font-family: var(--font-mono);
+}