feat: Snapshot exporting tool (#1877)

In this PR:
1 We create a golang grpc client to request data from rippled
2 We store the data into the specific place
3 Add unittests
4 Create build script, the build can be initiated by set conan option
`snapshot` being true.

Please ignore the grpc server part. It will be implemented in importing
tool.

tools/snapshot/internal/parse_args/parse_args_test.go

@@ -0,0 +1,94 @@
+package parse_args
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"reflect"
+	"testing"
+)
+
+func TestParse(t *testing.T) {
+	tests := []struct {
+		name       string
+		args       []string
+		want       *Args
+		expectErr  bool
+		errMessage string
+	}{
+		{
+			name: "Valid export full mode",
+			args: []string{"cmd", "--export=full", "--start_seq=1", "--end_seq=10", "--path=/data", "--grpc_server=localhost:50051"},
+			want: &Args{
+				ExportMode: "full",
+				StartSeq:   1,
+				EndSeq:     10,
+				Path:       "/data",
+				GrpcServer: "localhost:50051",
+				ServerMode: false,
+			},
+			expectErr: false,
+		},
+		{
+			name:       "Missing required flags in export mode",
+			args:       []string{"cmd", "--export=delta", "--start_seq=1"},
+			want:       nil,
+			expectErr:  true,
+			errMessage: "Invalid usage: --start_seq, --end_seq, --grpc_server and --path are required for export",
+		},
+		{
+			name:       "Invalid export mode",
+			args:       []string{"cmd", "--export=invalid"},
+			want:       nil,
+			expectErr:  true,
+			errMessage: "Invalid usage: Invalid export mode. Use 'full' or 'delta'.",
+		},
+		{
+			name: "Server mode with default grpc server flags",
+			args: []string{"cmd", "--server", "--ws_port=1234", "--grpc_port=22", "--path=/server_data"},
+			want: &Args{
+				ServerMode: true,
+				GrpcPort:   22,
+				WsPort:     1234,
+				StartSeq:   0,
+				EndSeq:     0,
+				Path:       "/server_data",
+				GrpcServer: "localhost:50051",
+			},
+			expectErr: false,
+		},
+		{
+			name:       "Server and export mode together (error)",
+			args:       []string{"cmd", "--server", "--export=full"},
+			want:       nil,
+			expectErr:  true,
+			errMessage: "Invalid usage: --server and --export cannot be used at the same time.",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			flag.CommandLine = flag.NewFlagSet(os.Args[1], flag.ExitOnError)
+
+			os.Args = tt.args
+
+			fmt.Println("Running test with args:", tt.args)
+			got, err := Parse()
+
+			if tt.expectErr {
+				if err == nil {
+					t.Errorf("Expected error but got none")
+				} else if err.Error() != tt.errMessage {
+					t.Errorf("Expected error message '%s', got '%s'", tt.errMessage, err.Error())
+				}
+			} else {
+				if err != nil {
+					t.Errorf("Unexpected error: %v", err)
+				}
+				if !reflect.DeepEqual(got, tt.want) {
+					t.Errorf("Expected %+v, got %+v", tt.want, got)
+				}
+			}
+		})
+	}
+}