feat: IPv4/IPv6 selection and wrapped device names in topology

- New export option "IP-Versionen" (IPv4, IPv6 or both, default both).
  Applies to management/OOB IP columns, VMs, topology labels and filters
  the prefix and IP address sections by family.
- Topology device names longer than 15 characters are wrapped onto
  several lines, preferably after "-", "_", "." or spaces; row heights
  adapt to the number of lines.

Bump version to 0.7.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

netbox_customer_export/forms.py

@@ -77,6 +77,14 @@ class ExportForm(forms.Form):
     )
     topo_isolated = forms.BooleanField(required=False, initial=False, label="Unverkabelte Geräte anzeigen")
 
+    ip_versions = forms.MultipleChoiceField(
+        choices=(("4", "IPv4"), ("6", "IPv6")),
+        initial=["4", "6"],
+        required=False,
+        widget=forms.CheckboxSelectMultiple,
+        label="IP-Versionen",
+    )
+
     include_empty = forms.BooleanField(required=False, label="Leere Abschnitte trotzdem aufführen")
     include_secrets = forms.BooleanField(required=False, label="Geheimnisse (z.B. WLAN-PSK) mit exportieren")