refactor: move pkg/ to internal/ and update imports

Restructure project by relocating package contents from pkg/ to internal/ to better reflect internal-only usage. This commit is initial step to prepare project for public api

internal/manager/common.go

@@ -0,0 +1,35 @@
+// ALR - Any Linux Repository
+// Copyright (C) 2025 The ALR Authors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package manager
+
+import "os/exec"
+
+type CommonPackageManager struct {
+	noConfirmArg string
+}
+
+func (m *CommonPackageManager) getCmd(opts *Opts, mgrCmd string, args ...string) *exec.Cmd {
+	cmd := exec.Command(mgrCmd)
+	cmd.Args = append(cmd.Args, opts.Args...)
+	cmd.Args = append(cmd.Args, args...)
+
+	if opts.NoConfirm {
+		cmd.Args = append(cmd.Args, m.noConfirmArg)
+	}
+
+	return cmd
+}