[management, reverse proxy] Add reverse proxy feature (#5291)

* implement reverse proxy


---------

Co-authored-by: Alisdair MacLeod <git@alisdairmacleod.co.uk>
Co-authored-by: mlsmaycon <mlsmaycon@gmail.com>
Co-authored-by: Eduard Gert <kontakt@eduardgert.de>
Co-authored-by: Viktor Liu <viktor@netbird.io>
Co-authored-by: Diego Noguês <diego.sure@gmail.com>
Co-authored-by: Diego Noguês <49420+diegocn@users.noreply.github.com>
Co-authored-by: Bethuel Mmbaga <bethuelmbaga12@gmail.com>
Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>
Co-authored-by: Ashley Mensah <ashleyamo982@gmail.com>

management/cmd/token/token_test.go

@@ -0,0 +1,101 @@
+package tokencmd
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseDuration(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected time.Duration
+		wantErr  bool
+	}{
+		{
+			name:     "empty string returns zero",
+			input:    "",
+			expected: 0,
+		},
+		{
+			name:     "days suffix",
+			input:    "30d",
+			expected: 30 * 24 * time.Hour,
+		},
+		{
+			name:     "one day",
+			input:    "1d",
+			expected: 24 * time.Hour,
+		},
+		{
+			name:     "365 days",
+			input:    "365d",
+			expected: 365 * 24 * time.Hour,
+		},
+		{
+			name:     "hours via Go duration",
+			input:    "24h",
+			expected: 24 * time.Hour,
+		},
+		{
+			name:     "minutes via Go duration",
+			input:    "30m",
+			expected: 30 * time.Minute,
+		},
+		{
+			name:     "complex Go duration",
+			input:    "1h30m",
+			expected: 90 * time.Minute,
+		},
+		{
+			name:    "invalid day format",
+			input:   "abcd",
+			wantErr: true,
+		},
+		{
+			name:    "negative days",
+			input:   "-1d",
+			wantErr: true,
+		},
+		{
+			name:    "zero days",
+			input:   "0d",
+			wantErr: true,
+		},
+		{
+			name:    "non-numeric days",
+			input:   "xyzd",
+			wantErr: true,
+		},
+		{
+			name:    "negative Go duration",
+			input:   "-24h",
+			wantErr: true,
+		},
+		{
+			name:    "zero Go duration",
+			input:   "0s",
+			wantErr: true,
+		},
+		{
+			name:    "invalid Go duration",
+			input:   "notaduration",
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result, err := ParseDuration(tt.input)
+			if tt.wantErr {
+				assert.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}