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/build/script_resolver.go

@@ -0,0 +1,53 @@
+// 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 build
+
+import (
+	"context"
+	"path/filepath"
+
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/db"
+)
+
+type ScriptResolver struct {
+	cfg Config
+}
+
+type ScriptInfo struct {
+	Script     string
+	Repository string
+}
+
+func (s *ScriptResolver) ResolveScript(
+	ctx context.Context,
+	pkg *db.Package,
+) *ScriptInfo {
+	var repository, script string
+
+	repodir := s.cfg.GetPaths().RepoDir
+	repository = pkg.Repository
+	if pkg.BasePkgName != "" {
+		script = filepath.Join(repodir, repository, pkg.BasePkgName, "alr.sh")
+	} else {
+		script = filepath.Join(repodir, repository, pkg.Name, "alr.sh")
+	}
+
+	return &ScriptInfo{
+		Repository: repository,
+		Script:     script,
+	}
+}