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/parser/parser.go

@@ -0,0 +1,38 @@
+// 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 parser
+
+import (
+	"fmt"
+
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/shutils/decoder"
+)
+
+type PackageNames struct {
+	BasePkgName string   `sh:"basepkg_name"`
+	Names       []string `sh:"name"`
+}
+
+func ParseNames(dec *decoder.Decoder) (*PackageNames, error) {
+	var pkgs PackageNames
+	err := dec.DecodeVars(&pkgs)
+	if err != nil {
+		return nil, fmt.Errorf("fail parse names: %w", err)
+	}
+
+	return &pkgs, nil
+}