docs(cli): add examples

Author: KSXGitHub

src/args.rs

@@ -35,6 +35,7 @@ use text_block_macros::text_block;
         "    $ pdu path/to/file/or/directory"
         "    $ pdu file.txt dir/"
         "    $ pdu --quantity=apparent-size"
+        "    $ pdu --deduplicate-hardlinks"
         "    $ pdu --bytes-format=plain"
         "    $ pdu --bytes-format=binary"
         "    $ pdu --min-ratio=0"
@@ -57,6 +58,9 @@ use text_block_macros::text_block;
         "    Show chart in apparent sizes instead of block sizes"
         "    $ pdu --quantity=apparent-size"
         ""
+        "    Detect and subtract the sizes of hardlinks from total"
+        "    $ pdu --deduplicate-hardlinks"
+        ""
         "    Show sizes in plain numbers instead of metric units"
         "    $ pdu --bytes-format=plain"
         ""