!1 Init Packaging, Add source files.

From: @dwl301 
Reviewed-by: @zhang__3125 
Signed-off-by: @zhang__3125

libpanel.spec

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+Name:           libpanel
+Version:        1.0.2
+Release:        1
+Summary:        IDE paneling library for GTK
+License:        LGPLv3+
+URL:            https://gitlab.gnome.org/GNOME/libpanel
+Source0:        https://download.gnome.org/sources/libpanel/1.0/%{name}-%{version}.tar.xz
+
+BuildRequires:  gcc
+BuildRequires:  meson
+BuildRequires:  pkgconfig(gi-docgen)
+BuildRequires:  pkgconfig(glib-2.0)
+BuildRequires:  pkgconfig(gtk4)
+BuildRequires:  pkgconfig(libadwaita-1)
+
+Requires:       hicolor-icon-theme
+
+%description
+libpanel is a collection of GTK widgets for IDE-like applications targeting
+GNOME using GTK and libadwaita.
+
+%package        devel
+Summary:        Development files for %{name}
+Requires:       %{name}%{?_isa} = %{version}-%{release}
+
+%description    devel
+The %{name}-devel package contains libraries and header files for
+developing applications that use %{name}.
+
+%prep
+%autosetup -p1
+
+%build
+%meson
+%meson_build
+
+%install
+%meson_install
+
+%find_lang libpanel
+
+%files -f libpanel.lang
+%license COPYING
+%doc AUTHORS NEWS README.md
+%{_libdir}/libpanel-1.so.1*
+%{_libdir}/girepository-1.0/Panel-1.typelib
+%{_datadir}/icons/hicolor/scalable/actions/panel-*-symbolic.svg
+
+%files devel
+%{_includedir}/libpanel-1/
+%{_libdir}/libpanel-1.so
+%{_libdir}/pkgconfig/libpanel-1.pc
+%{_datadir}/gir-1.0/Panel-1.gir
+%{_datadir}/vala/vapi/
+%doc %{_datadir}/doc/panel-1.0/
+
+%changelog
+* Mon Jan 02 2023 lin zhang <lin.zhang@turbolinux.ocm.cn> - 1.0.2-1
+- Init Packaging

libpanel.yaml

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+version_control: gitlab.gnome
+src_repo: libpanel
+tag_prefix: ^
+separator: .