assets: add comprehensive network device icon library

- Add SVG icons for network topology visualization
- Support for various network device types
- Icons for routers, switches, firewalls, servers

src/assets/Network-Icons-SVG/generic-switch-l2-v2-mono.svg

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   id="svg7778"
+   viewBox="0 0 146.47219 146.23581"
+   height="41.270992mm"
+   width="41.337704mm">
+  <defs
+     id="defs7780" />
+  <metadata
+     id="metadata7783">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     id="g818">
+    <rect
+       ry="8.9952965"
+       y="2.8232942"
+       x="2.8232944"
+       height="140.58922"
+       width="140.82561"
+       id="rect4136-2-3-3"
+       style="opacity:1;fill:#fdfdfd;fill-opacity:1;stroke:#2c2c2c;stroke-width:5.6465888;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:2;stroke-dasharray:none;stroke-opacity:1" />
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+       id="rect864"
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+       id="rect864-2"
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+  </g>
+</svg>