enhance: Add comprehensive .gitignore for deb-mock project

- Add mock-specific build artifacts (chroot/, mock-*, mockroot/)
- Include package build files (*.deb, *.changes, *.buildinfo)
- Add development tools (.coverage, .pytest_cache, .tox)
- Include system files (.DS_Store, Thumbs.db, ._*)
- Add temporary and backup files (*.tmp, *.bak, *.backup)
- Include local configuration overrides (config.local.yaml, .env.local)
- Add test artifacts and documentation builds
- Comprehensive coverage for Python build system project

This ensures build artifacts, chroot environments, and development
tools are properly ignored in version control.

mock/Makefile

@@ -0,0 +1,45 @@
+# vim:noexpandtab:autoindent:tabstop=8:shiftwidth=8:filetype=make:nocindent:tw=0:
+check:
+	./integration-tests/runtests.sh
+
+AUTHORS:
+	(GIT_DIR=.git git log | grep ^Author | sort |uniq > .authors.tmp && mv .authors.tmp AUTHORS; rm -f .authors.tmp) || (touch AUTHORS; echo 'git directory not found: installing possibly empty AUTHORS.' >&2)
+
+install-exec-hook:
+	for i in $(REPLACE_VARS_ON_INSTALL); do      \
+		file=$(DESTDIR)/$$i			;\
+                perl -p -i -e 's|^__VERSION__\s*=.*|__VERSION__="$(RELEASE_VERSION)"|' $$file ;\
+                perl -p -i -e 's|^SYSCONFDIR\s*=.*|SYSCONFDIR="$(sysconfdir)"|' $$file        ;\
+                perl -p -i -e 's|^PYTHONDIR\s*=.*|PYTHONDIR="$(pythondir)"|' $$file           ;\
+                perl -p -i -e 's|^PKGPYTHONDIR\s*=.*|PKGPYTHONDIR="$(mockbuilddir)"|' $$file  ;\
+                perl -p -i -e 's|^PKGDATADIR\s*=.*|PKGDATADIR="$(pkgdatadir)"|' $$file        ;\
+                perl -p -i -e 's|^LIBDIR\s*=.*|LIBDIR="$(libdir)"|' $$file        ;\
+        done
+	mv $(DESTDIR)/$(sbindir)/mock.py $(DESTDIR)/$(sbindir)/mock
+	[ -d $(DESTDIR)/$(bindir) ] || mkdir $(DESTDIR)/$(bindir)
+	mv $(DESTDIR)/$(sbindir)/mockchain.py $(DESTDIR)/$(bindir)/mockchain
+
+
+.PHONY: rpm srpm help install-devel-packages
+rpm:
+	tito build --test --rpm
+
+srpm:
+	tito build --test --srpm
+
+install-devel-packages:
+	yum --disablerepo='beaker*' install mock rpm-build fedora-packager vim-enhanced git-all
+
+help:
+	@echo
+	@echo "Mock Makefile targets:"
+	@echo "	dist	- generate Authors file"
+	@echo "	rpm	- build binary RPM"
+	@echo "	srpm	- build source RPM"
+	@echo "	help	- print this message"
+	@echo "Additionally, all standard automake targets are supported"
+	@echo
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT: