org-numbering

This package provides various numbering schemes for org-numbering.
Currently supported schemes:
- Decimal (1, 2, 3...)
- Alphabetic (a, b, c...)
- Roman numerals (I, II, III...)
- Chinese numerals (一、二、三...)
- Upper alpha (A, B, C...)
- Circled numbers (①, ②, ③...)
- Parenthesized letters (⒜, ⒝, ⒞...)
- Bullet points (•)
- Dashes (-)
- Squares (□)
- Greek letters (α, β, γ...)
- Parenthesized numbers ((1), (2), (3)...)
- Parenthesized roman ((i), (ii), (iii)...)
- Katakana (ア、イ、ウ...)
- Iroha order (イ、ロ、ハ...)
- Chapter style (第一章、第二章...)
- Parenthesized Chinese (（一）、（二）...)
- Extended circled (⑴, ⑵, ⑶...)
- White circled (○１、○２、○３...)

Example mixed numbering schemes for different styles:

1. Academic Paper Style (English):
   (setq org-numbering-level-scheme
         '((1 . ((scheme . decimal)      ; 1.
                 (combine . nil)))
           (2 . ((scheme . decimal)      ; 1.1
                 (combine . t)))
           (3 . ((scheme . decimal)      ; 1.1.1
                 (combine . t)))
           (4 . ((scheme . alpha)        ; a)
                 (combine . nil)))
           (5 . ((scheme . paren-num)    ; (1)
                 (combine . nil)))))

2. German Style:
   (setq org-numbering-level-scheme
         '((1 . ((scheme . decimal)      ; 1.
                 (combine . nil)))
           (2 . ((scheme . upper-alpha)  ; A.
                 (combine . nil)))
           (3 . ((scheme . alpha)        ; a)
                 (combine . nil)))
           (4 . ((scheme . greek)        ; α)
                 (combine . nil)))
           (5 . ((scheme . dash)         ; -
                 (combine . nil)))))

3. Chinese Academic Style:
   (setq org-numbering-level-scheme
         '((1 . ((scheme . chapter)      ; 第一章
                 (combine . nil)))
           (2 . ((scheme . decimal)      ; 1.1
                 (combine . t)))
           (3 . ((scheme . paren-chinese) ; （一）
                 (combine . nil)))
           (4 . ((scheme . extended-circled) ; ⑴
                 (combine . nil)))
           (5 . ((scheme . white-circled)   ; ○１、
                 (combine . nil)))))

4. Japanese Document Style:
   (setq org-numbering-level-scheme
         '((1 . ((scheme . decimal)      ; 1.
                 (combine . nil)))
           (2 . ((scheme . katakana)     ; ア、
                 (combine . nil)))
           (3 . ((scheme . circled)      ; ①
                 (combine . nil)))
           (4 . ((scheme . iroha)        ; イ、
                 (combine . nil)))
           (5 . ((scheme . square)       ; □
                 (combine . nil)))))