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_musicmouse/tasks/main.yml

@@ -0,0 +1,51 @@
+---
+- name: Packages
+  ansible.builtin.apt:
+    name:
+      - python3
+      - python3-pip
+      - python3-vlc # also in venv - but this installs vlc + deps
+      - samba
+- name: Checkout Musicmouse repo
+  ansible.builtin.git:
+    repo: "ssh://git@git.bauer.tech:2222/martin/musicmouse.git"
+    dest: "/opt/musicmouse"
+    version: "release/1.1"
+    accept_hostkey: true
+- name: Create and update virtual env
+  ansible.builtin.pip:
+    requirements: /opt/musicmouse/espmusicmouse/host_driver/requirements.txt
+    virtualenv: /opt/musicmouse_venv
+    virtualenv_command: "/usr/bin/python3 -m venv"
+- name: Create media directory
+  ansible.builtin.file:
+    path: /media/musicmouse
+    state: directory
+- name: Install config file
+  ansible.builtin.copy:
+    src: config.yml
+    dest: /media/musicmouse/config.yml
+- name: Install systemd service file
+  ansible.builtin.copy:
+    src: musicmouse.service
+    dest: /etc/systemd/system/
+- name: Add script to autostart and start now
+  ansible.builtin.systemd:
+    name: musicmouse
+    state: restarted
+    enabled: "yes"
+    daemon_reload: "yes"
+- name: Samba setup
+  ansible.builtin.copy:
+    src: smb.conf
+    dest: /etc/samba/
+- name: Restart samba
+  ansible.builtin.systemd:
+    name: smbd
+    state: restarted
+    enabled: "yes"
+# manual steps:
+#    - set samba passwords with smbpasswd
+#    - copy music into /media/musicmouse (or via samba share)
+#    - upload host driver?
+#    - manual patching of hassclient necessary :( loop has to be passed in, to not use running_event_loop