docs: update readme

README.md

@@ -71,6 +71,7 @@ Flags:
       --si                            Show sizes with decimal SI prefixes (kB, MB, GB) instead of binary prefixes (KiB, MiB, GiB)
       --storage-path string           Path to persistent key-value storage directory (default "/tmp/badger")
   -s, --summarize                     Show only a total in non-interactive mode
+  -t, --top int                       Show only top X largest files in non-interactive mode
       --use-storage                   Use persistent key-value storage for analysis data (experimental)
   -v, --version                       Print version
       --write-config                  Write current configuration to file (default is $HOME/.gdu.yaml)
@@ -104,6 +105,7 @@ Basic list of actions in interactive mode (show help modal for more):
     gdu -n /                              # only print stats, do not start interactive mode
     gdu -np /                             # do not show progress, useful when using its output in a script
     gdu -nps /some/dir                    # show only total usage for given dir
+    gdu -nt 10 /                          # show top 10 largest files
     gdu / > file                          # write stats to file, do not start interactive mode
 
     gdu -o- / | gzip -c >report.json.gz   # write all info to JSON file for later analysis

gdu.1.md

@@ -54,6 +54,8 @@ non-interactive mode
 
 **-s**, **\--summarize**\[=false\] Show only a total in non-interactive mode
 
+**-t**, **\--top**\[=0\] Show only top X largest files in non-interactive mode
+
 **-d**, **\--show-disks**\[=false\] Show all mounted disks
 
 **-a**, **\--show-apparent-size**\[=false\] Show apparent size