feat: Use full-width tables in expanders (#366)

Full-width tables look a bit better:

<img width="854" height="352" alt="image"
src="https://github.com/user-attachments/assets/42b442ce-f7b3-4be1-8c69-5ae7fb0288ce"
/>

Before:

<img width="848" height="349" alt="image"
src="https://github.com/user-attachments/assets/42f073fb-f311-4f2a-8ec1-e8764d0a7e5b"
/>


Removing the margin-right on inside elements of the expanders, they were
introduced because of
#142, but it
doesn't seem to be an issue anymore.

Author: MoritzWeber0

assets/sass/expander.scss

@@ -54,6 +54,11 @@ details {
   border-radius: var(--border-radius-m);
   margin-bottom: 1.2rem;
   border: var(--border);
+
+  table {
+    width: 100%;
+    margin-left: 0;
+  }
 }
 
 details > summary {
@@ -68,10 +73,6 @@ details > div {
   overflow-x: auto;
 }
 
-details > div > * {
-  margin-right: 1rem;
-}
-
 details > summary::-webkit-details-marker {
   display: none;
 }