[12.x] - Add Str::ordinal() helper method to return ordinal suffixes for numbers

[semernur]

This PR adds a new Str::ordinal() helper method to return the ordinal representation of a number (e.g., 1st, 2nd, 3rd, etc.).

Example

Str::ordinal(1);   // "1st"
Str::ordinal(2);   // "2nd"
Str::ordinal(3);   // "3rd"
Str::ordinal(11);  // "11th"
Str::ordinal(21);  // "21st"

[Seb33300]

The implementation should support different languages, such as the Str::plural() helper method.

In french:

Str::ordinal(1);   // "1er" (or "1re" if female)
Str::ordinal(2);   // "2e"
Str::ordinal(3);   // "3e"
Str::ordinal(11);  // "11e"
Str::ordinal(21);  // "21e"

[Seb33300]

Just found that a Number::spellOrdinal() already exist in the Number helper.

So your helper should probably be moved to the Number class next to the existing one.

[semernur]

Just found that a Number::spellOrdinal() already exist in the Number helper.

So your helper should probably be moved to the Number class next to the existing one.

Matter of fact, the ordinal helper is already there inside the Number class, Lol.