feat: clipboard files, audit

Signed-off-by: fufesou <linlong1266@gmail.com>

protos/message.proto

@@ -557,6 +557,16 @@ message CliprdrFileContentsResponse {
 message CliprdrTryEmpty {
 }
 
+// Clipobard file message for audit.
+message CliprdrFile {
+  string name = 1;
+  uint64 size = 2;
+}
+
+message CliprdrFiles {
+  repeated CliprdrFile files = 1;
+}
+
 message Cliprdr {
   oneof union {
     CliprdrMonitorReady ready = 1;
@@ -567,6 +577,7 @@ message Cliprdr {
     CliprdrFileContentsRequest file_contents_request = 6;
     CliprdrFileContentsResponse file_contents_response = 7;
     CliprdrTryEmpty try_empty = 8;
+    CliprdrFiles files = 9;
   }
 }