[FEATURE REQUEST] Expanding numbering feature

[the-liquid-metal]

1. It seems that Add Number is the same as $(N:3:4:5). Unfortunately there is no equivalent for $(K:3:4:5).
   Suggestion: add Apply to field, with options: Global and Each folder.

2. The Fill with zero feature feels very clunky, and not everyone needs zeros. What if someone need # or _ for padding.
   Suggestion: add Fill with char field, and rename Fill with zero to Padding Length.

3. There are left padding and right padding.
   Suggestion: add Padding side field with options: Left and Right.

4. There are cases where people want to group files in a folder. We can utilize numbering for this one.
   Suppose that i want each groups has maximum 6 files. All i have to do is counting from 1 to 6 and than restart counting. This is exactly the same as numbering with base 6. Followed by additional text replacement, I get files with groupname in its name.
   Suggestion: add base number field. If user types value greater than 10 then alphabet chars are also used.

5. The only 2 options in Place to put number field makes numbering feels very clunky.
   Suggestion:

   • Add Exact Position option to Place to put number field
   • Add Position field with number type. This field only enabled if Exact Position is selected.

6. At the moment, szyszka only support ascending numbering.
   Suggestion: add Direction field, with options: Ascending and Descending.

7. Add Number will surpass $(N) and $(K) functionallities, and more descriptive, $(N) and $(K) can be removed. Or you can keep it if you still like it.