docs: added code documentation to updateAssignCrewCommand procedure

FossilOrigin-Name: 7c8a4df418565547b5ce5670f5f7a407daaa2fb2bd9f9eaefe2168517100f0f6

nim/src/ui/shipsuimodules.nim

@@ -1029,6 +1029,20 @@ proc resetDestinationCommand(clientData: cint; interp: PInterp; argc: cint;
 
 proc updateAssignCrewCommand(clientData: cint; interp: PInterp; argc: cint;
     argv: openArray[cstring]): TclResults {.sideEffect, raises: [], tags: [RootEffect].} =
+  ## Update assign the crew member UI
+  ##
+  ## * clientData - the additional data for the Tcl command
+  ## * interp     - the Tcl interpreter on which the command was executed
+  ## * argc       - the amount of arguments entered for the command
+  ## * argv       - the list of the command's arguments
+  ##
+  ## The procedure always return tclOk
+  ##
+  ## Tcl:
+  ## UpdateAssignCrew moduleindex ?crewindex?
+  ## Moduleindex is the index of the module to which a new crew members will
+  ## be assigned. Crewindex is the index of the crew member which will be
+  ## assigned or removed
   let
     moduleIndex = try:
         ($argv[1]).parseInt