circled numbers

[moritz-gross]

Great thanks for the PR and the correction to it. I'll merge it, but for completeness, it would be good to extend this to the circled numbers also. Any takers?

AI says these are:

1. Enclosed Alphanumerics
   This is the primary block for circled characters. It starts with the digit 1 (the circled zero is located later in the block).

   First Circled Number (1): U+2460 (①)

   Note: Circled zero (⓪) is at U+24EA.

2. Dingbats
   This block contains decorative, heavy, and serif-style circled numbers.

   First Circled Number (1): U+2776 (❶) — Black Circled Digit One

   Note: The serif version (➀) starts at U+277F.

3. Enclosed Alphanumeric Supplement
   This block contains circled numbers from 21 through 50.

   First Circled Number (21): U+1F151 (㉑)

4. CJK Symbols and Punctuation
   This block contains circled numbers specifically designed to match East Asian typography (often used for dates or list markers).

   First Circled Number (1): U+303D (〽) is a separator, but the circled numbers 1-10 start at U+3220 (㈠).

   Note: These are technically "parenthesized" or "circled" Ideographs/Digits.

Originally posted by @NSoiffer in #524 (comment)