Add C9200-48PXG CSS and YAML layout examples

- Rename C9200L-48P-4X.css to C9200-48PXG.css (correct device model name)
- Add examples/yaml/Cisco/C9200-48PXG.yaml with base 48x GigE layout
  and C9200-NM-4X variant (4x TenGigabitEthernet in bottom row)
- Add C9200-48PXG to the ready-made examples table in docs/layout-yaml.md

Author: peterbaumert

docs/layout-yaml.md

@@ -307,6 +307,7 @@ Example YAML files are available in [`examples/yaml/`](https://github.com/peterb
 
 | File | Device |
 |---|---|
+| `Cisco/C9200-48PXG.yaml` | Cisco Catalyst 9200-48PXG (+ C9200-NM-4X variant) |
 | `Cisco/C9300-24T.yaml` | Cisco Catalyst 9300-24T (+ C9300-NM-8X variant) |
 | `Cisco/C2960X-24TD-L.yaml` | Cisco Catalyst 2960X-24TD-L |
 | `Cisco/C8300-2N2S-4T2X.yaml` | Cisco C8300-2N2S-4T2X |

examples/Cisco/C9200L-48P-4X.css examples/Cisco/C9200-48PXG.cssexamples/Cisco/C9200L-48P-4X.css renamed to examples/Cisco/C9200-48PXG.css

@@ -0,0 +1,80 @@
+version: 1
+
+meta:
+  description: "Cisco Catalyst 9200-48PXG"
+
+canvas:
+  columns: 32
+  rows: 2
+
+views:
+  front:
+    rows:
+      - group:
+          spacer: 1
+          sections:
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 1
+                count: 12
+                pattern: top-odd
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 13
+                count: 12
+                pattern: top-odd
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 25
+                count: 12
+                pattern: top-odd
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 37
+                count: 12
+                pattern: top-odd
+            - blank: 5
+
+variants:
+  C9200-NM-4X:
+    match: module
+    rows:
+      - group:
+          spacer: 1
+          sections:
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 1
+                count: 12
+                pattern: top-odd
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 13
+                count: 12
+                pattern: top-odd
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 25
+                count: 12
+                pattern: top-odd
+            - sequence:
+                kind: interface
+                prefix: "gigabitethernet0-"
+                start: 37
+                count: 12
+                pattern: top-odd
+      - spacer: 1
+      - sequence:
+          kind: interface
+          prefix: "tengigabitethernet1-"
+          start: 1
+          count: 4
+          pattern: all
+          row: 2