Fix multi-package build: Rename packages to match source name

- Rename all packages from 'deb-mock-*' to 'mock-*' to match source name 'mock'
- Update debian/control package definitions and dependencies
- Rename .install files to match new package names
- Update CI workflow to look for 'mock_*.deb' instead of 'deb-mock_*.deb'

This fixes the core issue where only 1 package was being built instead of 6.
The Debian build system now correctly recognizes all 6 packages:
- mock (main package)
- mock-cache (cache utilities)
- mock-configs (configuration files)
- mock-dev (development tools)
- mock-filesystem (filesystem layout)
- mock-plugins (plugin system)

All 6 packages now build successfully locally and should work in CI.

debian/deb-mock-filesystem/usr/share/deb-mock/filesystem/filesystem/chroot-template.yaml

@@ -0,0 +1,44 @@
+# Chroot filesystem template for deb-mock
+# This file defines the basic filesystem structure for chroot environments
+
+filesystem:
+  directories:
+    - /bin
+    - /sbin
+    - /usr/bin
+    - /usr/sbin
+    - /usr/lib
+    - /usr/lib64
+    - /usr/include
+    - /usr/share
+    - /var
+    - /tmp
+    - /proc
+    - /sys
+    - /dev
+    - /etc
+    - /root
+    - /home
+    - /opt
+    - /srv
+    - /media
+    - /mnt
+
+  mount_points:
+    - source: /proc
+      target: /proc
+      type: proc
+      options: "nosuid,noexec,nodev"
+    - source: /sys
+      target: /sys
+      type: sysfs
+      options: "nosuid,noexec,nodev,ro"
+    - source: /dev
+      target: /dev
+      type: devtmpfs
+      options: "nosuid,strictatime,size=65536k,mode=755"
+
+  permissions:
+    /root: "755"
+    /tmp: "1777"
+    /var/tmp: "1777"

debian/deb-mock-filesystem/usr/share/deb-mock/mounts/mounts/README.md

@@ -0,0 +1 @@
+# Mount points

debian/deb-mock-filesystem/usr/share/deb-mock/templates/templates/README.md

@@ -0,0 +1 @@
+# Templates directory

debian/deb-mock-filesystem/usr/share/doc/deb-mock-filesystem/copyright

@@ -0,0 +1,45 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: mock
+Source: https://git.raines.xyz/robojerk/deb-mock
+
+Files: *
+Copyright: 2025 Mock Team <mock@raines.xyz>
+License: MIT
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+ .
+ The above copyright notice and this permission notice shall be included in all
+ copies or substantial portions of the Software.
+ .
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+
+Files: debian/*
+Copyright: 2025 Mock Team <mock@raines.xyz>
+License: MIT
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+ .
+ The above copyright notice and this permission notice shall be included in all
+ copies or substantial portions of the Software.
+ .
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.