fix: disallow file name too long when writing a file (#4881)

* fix: disallow file name too long when writing a file

* bool LongerName to MaxFilenameLength

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Co-authored-by: Konstantin Lebedev <9497591+kmlebedev@users.noreply.github.co>

weed/command/scaffold/filer.toml

@@ -12,6 +12,7 @@
 # with http DELETE, by default the filer would check whether a folder is empty.
 # recursive_delete will delete all sub folders and files, similar to "rm -Rf"
 recursive_delete = false
+#max_file_name_length = 255
 
 ####################################################
 # The following are filer store options