feat: unified config (#533)

* chore: add yaml config ref

* feat: add initial implementation of a traefik like cli

* refactor: remove dependency on traefik

* chore: update example env

* refactor: update build

* chore: remove unused code

* fix: fix translations not loading

* feat: add experimental config file support

* chore: mod tidy

* fix: review comments

* refactor: move tinyauth to separate package

* chore: add quotes to all env variables

* chore: resolve go mod and sum conflicts

* chore: go mod tidy

* fix: review comments

internal/utils/loaders/loader_flag.go

@@ -0,0 +1,22 @@
+package loaders
+
+import (
+	"fmt"
+
+	"github.com/traefik/paerser/cli"
+	"github.com/traefik/paerser/flag"
+)
+
+type FlagLoader struct{}
+
+func (*FlagLoader) Load(args []string, cmd *cli.Command) (bool, error) {
+	if len(args) == 0 {
+		return false, nil
+	}
+
+	if err := flag.Decode(args, cmd.Configuration); err != nil {
+		return false, fmt.Errorf("failed to decode configuration from flags: %w", err)
+	}
+
+	return true, nil
+}