refactor: moved some types from variables module to types module and updated Variable object definition

FossilOrigin-Name: 3c546934c181ffd6a60d4558bfcdc96c81585fea6fab47ec3333361651d61ef6

Author: thindil

src/types.nim

@@ -152,6 +152,12 @@ type
   VariableValType* = enum
     ## Used to set the type of variable's value
     path, text, number
+  VariableName* = string
+    ## Used to store variables names in the database
+  VariableValue* = string
+    ## Used to store variables' values
+  VariableDescription* = string
+    ## Used to store variables' descriptions
   Variable* {.tableName: "variables".} = ref object of Model
     ## Data structure for the shell's environment variable
     ##
@@ -160,12 +166,12 @@ type
     ## * recursive   - if true, the variable is available also in subdirectories
     ## * value       - the value of the variable
     ## * description - the description of the variable
-    name*: string
+    name*: VariableName
     path*: Path
     recursive*: bool
-    value*: string
+    value*: VariableValue
     varType*: VariableValType
-    description*: string
+    description*: VariableDescription
   ResultCode* = distinct Natural
     ## Used to store result code from commands entered by the user
   CommandName* = string

src/variables.nim

@@ -45,12 +45,6 @@ const
       'n': "number", 'q': "quit"}.toTable
     ## The list of available options when setting the type of a variable's value
 
-type
-  VariableName = string
-    ## Used to store variables names in the database.
-  VariableValue = string
-    ## Used to store variables' values
-
 using
   db: DbConn # Connection to the shell's database
   arguments: UserInput # The string with arguments entered by the user for the command