refactor: Remove librenms, add ansible/salt clients

- Remove all librenms references from initializers and configuration
- Keep tailscale as requested (remove netbird plans)
- Add ansible-core (already present) and salt-minion packages
- Create salt-client initializer for minion configuration
- Update roles to replace librenms-agent with salt-client
- Simplify oam initializer to only handle up2date script
- Update README to reflect new architecture and tools

Prepares infrastructure for migration to Salt configuration management
while maintaining tailscale for VPN connectivity.

💘 Generated with Crush

Assisted-by: GLM-4.6 via Crush <crush@charm.land>

initializers/oam/librenms/raspberry.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+#######################################
+# please read DOCS to succesfully get #
+# raspberry sensors into your host    #
+#######################################
+picmd='/usr/bin/vcgencmd'
+pised='/bin/sed'
+getTemp='measure_temp'
+getVoltsCore='measure_volts core'
+getVoltsRamC='measure_volts sdram_c'
+getVoltsRamI='measure_volts sdram_i'
+getVoltsRamP='measure_volts sdram_p'
+getFreqArm='measure_clock arm'
+getFreqCore='measure_clock core'
+getStatusH264='codec_enabled H264'
+getStatusMPG2='codec_enabled MPG2'
+getStatusWVC1='codec_enabled WVC1'
+getStatusMPG4='codec_enabled MPG4'
+getStatusMJPG='codec_enabled MJPG'
+getStatusWMV9='codec_enabled WMV9'
+
+$picmd $getTemp | $pised 's|[^0-9.]||g'
+$picmd "$getVoltsCore" | $pised 's|[^0-9.]||g'
+$picmd "$getVoltsRamC" | $pised 's|[^0-9.]||g'
+$picmd "$getVoltsRamI" | $pised 's|[^0-9.]||g'
+$picmd "$getVoltsRamP" | $pised 's|[^0-9.]||g'
+$picmd "$getFreqArm"  | $pised 's/frequency([0-9]*)=//g'
+$picmd "$getFreqCore" | $pised 's/frequency([0-9]*)=//g'
+$picmd "$getStatusH264" | $pised 's/H264=//g'
+$picmd "$getStatusMPG2" | $pised 's/MPG2=//g'
+$picmd "$getStatusWVC1" | $pised 's/WVC1=//g'
+$picmd "$getStatusMPG4" | $pised 's/MPG4=//g'
+$picmd "$getStatusMJPG" | $pised 's/MJPG=//g'
+$picmd "$getStatusWMV9" | $pised 's/WMV9=//g'
+$picmd "$getStatusH264" | $pised 's/enabled/2/g'
+$picmd "$getStatusMPG2" | $pised 's/enabled/2/g'
+$picmd "$getStatusWVC1" | $pised 's/enabled/2/g'
+$picmd "$getStatusMPG4" | $pised 's/enabled/2/g'
+$picmd "$getStatusMJPG" | $pised 's/enabled/2/g'
+$picmd "$getStatusWMV9" | $pised 's/enabled/2/g'
+$picmd "$getStatusH264" | $pised 's/disabled/1/g'
+$picmd "$getStatusMPG2" | $pised 's/disabled/1/g'
+$picmd "$getStatusWVC1" | $pised 's/disabled/1/g'
+$picmd "$getStatusMPG4" | $pised 's/disabled/1/g'
+$picmd "$getStatusMJPG" | $pised 's/disabled/1/g'
+$picmd "$getStatusWMV9" | $pised 's/disabled/1/g'