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/search/search.go

@@ -0,0 +1,66 @@
+// 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 search
+
+import (
+	"context"
+
+	"github.com/jmoiron/sqlx"
+
+	database "gitea.plemya-x.ru/Plemya-x/ALR/internal/db"
+)
+
+type PackagesProvider interface {
+	GetPkgs(ctx context.Context, where string, args ...any) (*sqlx.Rows, error)
+}
+
+type Searcher struct {
+	pp PackagesProvider
+}
+
+func New(pp PackagesProvider) *Searcher {
+	return &Searcher{
+		pp: pp,
+	}
+}
+
+func (s *Searcher) Search(
+	ctx context.Context,
+	opts *SearchOptions,
+) ([]database.Package, error) {
+	var packages []database.Package
+
+	where, args := opts.WhereClause()
+	result, err := s.pp.GetPkgs(ctx, where, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	for result.Next() {
+		var dbPkg database.Package
+		err = result.StructScan(&dbPkg)
+		if err != nil {
+			return nil, err
+		}
+		packages = append(packages, dbPkg)
+	}
+
+	return packages, nil
+}