Fix gitignore and add missing device-types.yaml

.gitignore

@@ -1,5 +1,5 @@
-ipng-router-backup
+/ipng-router-backup
-*.yaml
+/*.yaml
 
 # Debian packaging artifacts
 debian/.debhelper/

docs/device-types.yaml

@@ -0,0 +1,42 @@
+types:
+  # Nokia SR Linux devices
+  srlinux:
+    commands:
+      - show version                    # System version and build info
+      - show platform linecard         # Line card information
+      - show platform fan-tray         # Fan status and health
+      - show platform power-supply     # Power supply status
+      - info flat from running         # Full running configuration
+
+  # Arista EOS devices
+  eos:
+    commands:
+      - show version                    # System version information
+      - show inventory                  # Hardware inventory
+      - show env power                  # Power supply status
+      - show running-config             # Complete running configuration
+
+  # Centec switches
+  centec:
+    commands:
+      - show version | exc uptime       # Version info without uptime line
+      - show boot images                # Boot image information
+      - show transceiver                # SFP/transceiver status
+      - show running-config             # Running configuration
+
+  # Cisco IOS/IOS-XE devices
+  cisco-ios:
+    commands:
+      - show version                    # IOS version and hardware info
+      - show inventory                  # Hardware inventory details
+      - show running-config             # Complete configuration
+      - show ip interface brief         # Interface IP summary
+      - show cdp neighbors              # CDP neighbor information
+
+  # Juniper devices
+  junos:
+    commands:
+      - show version                    # Software and hardware version
+      - show chassis hardware           # Chassis hardware details
+      - show configuration | display set # Configuration in set format
+      - show interfaces terse           # Interface status summary