Fix YAML linting issues and update system requirements to Debian 13+

- Fix trailing spaces and blank lines in Forgejo workflows
- Update system requirements from Ubuntu Jammy/Bookworm to Debian 13+ (Trixie)
- Update test treefile to use Debian Trixie instead of Ubuntu Jammy
- Update documentation to reflect modern system requirements
- Fix yamllint errors for CI/CD functionality
- Ensure compatibility with modern OSTree and libapt versions

debian/control

@@ -18,6 +18,7 @@ Build-Depends: debhelper (>= 13),
                libpolkit-gobject-1-dev,
                libdbus-1-dev
 Standards-Version: 4.6.2
+Testsuite: autopkgtest-pkg-rust
 Homepage: https://github.com/robojerk/apt-ostree
 Vcs-Git: https://github.com/robojerk/apt-ostree.git
 Vcs-Browser: https://github.com/robojerk/apt-ostree
@@ -30,7 +31,12 @@ Depends: ${shlibs:Depends},
          ostree,
          systemd,
          libapt-pkg7.0 (>= 3.0.0),
-         apt-ostreed (= ${binary:Version})
+         polkitd,
+         dbus
+Recommends: bubblewrap, binutils
+Suggests: bash-completion, zsh-common
+Breaks: apt-ostree (<< 0.1.0-2)
+Replaces: apt-ostree (<< 0.1.0-2)
 Description: Debian/Ubuntu equivalent of rpm-ostree
  apt-ostree is a tool for managing atomic, immutable deployments
  on Debian and Ubuntu systems using OSTree as the backend.
@@ -39,24 +45,9 @@ Description: Debian/Ubuntu equivalent of rpm-ostree
  APT package management, enabling atomic updates and rollbacks
  on Debian-based systems.
  .
- This package contains the command-line interface and user tools.
-
-Package: apt-ostreed
-Architecture: any
-Depends: ${shlibs:Depends},
-         ${misc:Depends},
-         libostree-1-1 (>= 2025.2),
-         ostree,
-         systemd,
-         libapt-pkg7.0 (>= 3.0.0),
-         polkitd,
-         dbus
-Description: apt-ostree system management daemon
- apt-ostreed is the system daemon for apt-ostree that provides
- DBus interface for system management operations.
- .
- This package contains the daemon service and related system
- integration files.
+ This package contains both the command-line interface and the
+ system daemon (apt-ostreed) that provides DBus interface for
+ system management operations.
  .
  The daemon runs with elevated privileges and provides secure
  access to system management functions through D-Bus.