Tree Item: Prevent prefix icon from shrinking (#686)

Wraps the prefix icon slot in a flex container, to prevent slotted SVGs from shrinking at narrow widths

Author: danwenzel

.changeset/friendly-carpets-fail.md

@@ -0,0 +1,5 @@
+---
+'@crowdstrike/glide-core': patch
+---
+
+SVGs placed in the `prefix` slot of a Tree Item will no longer shrink at narrow widths.

src/tree.item.styles.ts

@@ -56,6 +56,11 @@ export default [
       }
     }
 
+    .prefix-slot {
+      align-items: center;
+      display: flex;
+    }
+
     .label-and-children {
       display: flex;
       flex-direction: column;

src/tree.item.ts

@@ -122,6 +122,7 @@ export default class GlideCoreTreeItem extends LitElement {
 
         <slot
           name="prefix"
+          class="prefix-slot"
           ${ref(this.#prefixSlotElementRef)}
           @slotchange=${this.#onPrefixSlotChange}
         ></slot>