Build squeezelite on the device on a 64-bit or trixie userland

The shipped squeezelite is a 32-bit ARM binary linked against libFLAC.so.12 (bookworm
on armhf). Elsewhere the role now builds upstream squeezelite at a pinned commit with
the same options as the old ARM build, installing the -dev packages instead of
soname-specific runtime libraries. `ansible_architecture` is the kernel's, so the
choice reads the userland's architecture from dpkg; override with
`pi_squeezelite_custom_build_from_source: true|false`.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

roles/pi_squeezelite_custom/defaults/main.yml

@@ -0,0 +1,34 @@
+---
+# The shipped files/squeezelite is a 32-bit ARM binary linked against libFLAC.so.12, which
+# is what Debian bookworm on armhf provides. It cannot run on a 64-bit userland or on
+# trixie (libflac14), so by default ("auto") the role uses it only on armhf + Debian <= 12
+# and compiles pi_squeezelite_custom_version on the device everywhere else. Set true/false
+# to force one or the other.
+pi_squeezelite_custom_build_from_source: auto
+
+pi_squeezelite_custom_repo: https://github.com/ralph-irving/squeezelite.git
+# Upstream master when this was written (squeezelite 2.0, revision 1595). The commit the
+# prebuilt binary came from (c89faf3 in the old build notes) does not exist upstream.
+pi_squeezelite_custom_version: c7c4248ddd70e47dbfeba0bf4a8a7ec08d8a995c
+
+# Runtime libraries the prebuilt binary links (bookworm package names).
+pi_squeezelite_custom_runtime_packages:
+  - libmad0
+  - libmpg123-0
+  - libflac12
+  - libvorbisfile3
+  - libfaad2
+
+# Headers (and, through them, the runtime libraries) for building. Installing the -dev
+# packages is what makes this independent of soname bumps between Debian releases.
+pi_squeezelite_custom_build_packages:
+  - build-essential
+  - git
+  - libasound2-dev
+  - libssl-dev
+  - libsoxr-dev
+  - libflac-dev
+  - libvorbis-dev
+  - libmad0-dev
+  - libfaad-dev
+  - libmpg123-dev