Fix ansible-lint violations: FQCN, formatting, bugs, role renames

- Auto-fix FQCN, YAML formatting, jinja spacing, and free-form module
  syntax via ansible-lint --fix
- Fix comments misplaced inside module args by the auto-fixer
  (bluetooth-monitor, pi_standard_setup, pi_musicmouse)
- Fix notify: references left stale (lowercase) after handler names
  were re-cased, which would have silently broken reboot/restart
  handlers (pi_disable_onboard_bluetooth, pi_hifiberry_amp,
  pi_squeezelite, pi_standard_setup)
- Fix a task in pis/debmatic-install.yml missing its module name
  (apt_repository), which caused a real syntax-check failure
- Add missing play names, fix comment spacing, literal-compare idiom,
  and no-changed-when annotations
- Delete unused/broken roles/better-shell-env (unreferenced, invalid YAML)
- Rename all hyphenated role directories to underscore form to satisfy
  ansible-lint's role-name rule, updating every playbook/meta reference

Remaining lint findings (var-naming, package-latest, risky-file-permissions,
no-handler) intentionally left for follow-up per user decision.

roles/pi_irserver/files/irserver.readme

@@ -0,0 +1,17 @@
+downloaded from  
+http://www.irtrans.de/de/download/linux.php
+
+build on raspberry pi using
+
+make arm_noccfgcc
+
+-> linker errors with libzip
+-> installed libzip-dev and added lzip to linker parameters
+
+
+mkdir tmp
+cd tmp 
+tar xf ../irserver-src.tar.gz
+mkdir arm
+# in makefile add: LDFLAGS = -lzip
+make irserver_arm_noccf