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/repos/find.go

@@ -0,0 +1,81 @@
+// This file was originally part of the project "LURE - Linux User REpository", created by Elara Musayelyan.
+// It has been modified as part of "ALR - Any Linux Repository" by the ALR Authors.
+//
+// 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 repos
+
+import (
+	"context"
+
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/db"
+)
+
+func (rs *Repos) FindPkgs(ctx context.Context, pkgs []string) (map[string][]db.Package, []string, error) {
+	found := map[string][]db.Package{}
+	notFound := []string(nil)
+
+	for _, pkgName := range pkgs {
+		if pkgName == "" {
+			continue
+		}
+
+		result, err := rs.db.GetPkgs(ctx, "json_array_contains(provides, ?)", pkgName)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		added := 0
+		for result.Next() {
+			var pkg db.Package
+			err = result.StructScan(&pkg)
+			if err != nil {
+				return nil, nil, err
+			}
+
+			added++
+			found[pkgName] = append(found[pkgName], pkg)
+		}
+		result.Close()
+
+		if added == 0 {
+			result, err := rs.db.GetPkgs(ctx, "name LIKE ?", pkgName)
+			if err != nil {
+				return nil, nil, err
+			}
+
+			for result.Next() {
+				var pkg db.Package
+				err = result.StructScan(&pkg)
+				if err != nil {
+					return nil, nil, err
+				}
+
+				added++
+				found[pkgName] = append(found[pkgName], pkg)
+			}
+
+			result.Close()
+		}
+
+		if added == 0 {
+			notFound = append(notFound, pkgName)
+		}
+	}
+
+	return found, notFound, nil
+}