refactor: added some types and changed types of fields for Completion object

FossilOrigin-Name: 7ab1032016911f394898c24789858787819a7118dd4428d32a3a7f663d1c5270

Author: thindil

src/types.nim

@@ -124,16 +124,20 @@ type
     dirs = "Directories only", files = "Files only",
     dirsfiles = "Directories and files", commands = "Commands",
     custom = "Custom", none = "Completion for the selected command should be disabled"
+  CompletionCommand* = string
+    ## Used to store the command to which completion will be added
+  CompletionValues* = string
+    ## Used to store the values of the selected completion
   Completion* {.tableName: "completions".} = ref object of Model
     ## Data structure for the shell's commands' completion
     ##
     ## * command - the command for which the completion is set
     ## * cType   - the type of completion for the command
     ## * values  - the proper values of completion if the completion's type is
     ##             set to the custom type
-    command* {.unique.}: string
+    command* {.unique.}: CompletionCommand
     cType*: CompletionType
-    cValues*: string
+    cValues*: CompletionValues
   Plugin* {.tableName: "plugins".} = ref object of Model
     ## Data structure for the shell's plugin
     ##