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_squeezeserver/README.md

@@ -0,0 +1,4 @@
+# pi_squeezeserver
+
+Installs and enables the Logitech Media Server (`squeezeserver`) package,
+and registers it with `pi_sysdweb`.

roles/pi_squeezeserver/files/source_url.txt

@@ -0,0 +1,2 @@
+#http://downloads.slimdevices.com/LogitechMediaServer_v7.9.2/logitechmediaserver_7.9.2_arm.deb
+https://downloads.slimdevices.com/LogitechMediaServer_v8.4.0/logitechmediaserver_8.4.0_arm.deb

roles/pi_squeezeserver/tasks/main.yml

@@ -0,0 +1,44 @@
+---
+- name: Install packages required for squeeze server
+  ansible.builtin.apt:
+    name:
+      - libsox-fmt-all
+      - libflac-dev
+      - libfaad2
+      - libmad0
+      - perl-openssl-defaults
+      - libnet-ssleay-perl
+      - libio-socket-ssl-perl
+      - nasm
+      - build-essential
+      - iptables-persistent
+    cache_valid_time: 7200
+    state: present
+- name: Copy squeezeserver package
+  ansible.builtin.copy:
+    src: logitechmediaserver_8.4.0_arm.deb
+    dest: /tmp
+- name: Install squeezeserver package
+  ansible.builtin.apt:
+    deb: /tmp/logitechmediaserver_8.4.0_arm.deb
+- name: Enable sysdweb autostart
+  ansible.builtin.systemd:
+    name: logitechmediaserver
+    state: started
+    enabled: "yes"
+- name: Add to sysdweb
+  ansible.builtin.include_role:
+    name: pi_sysdweb
+  vars:
+    sysdweb_name: logitechmediaserver
+- name: Forward port 80 to 9000
+  ansible.builtin.iptables:
+    table: nat
+    chain: PREROUTING
+    in_interface: eth0
+    protocol: tcp
+    match: tcp
+    destination_port: "80"
+    jump: REDIRECT
+    to_ports: "9000"
+    comment: Redirect web traffic to port 9000