[QuickAccent]Add degree sign, integral, and vertical ellipsis

[rddunphy]

Summary of the Pull Request

Add degree sign, integral, and vertical ellipsis to QuickAccent

PR Checklist

• [x] Closes: #23237
• [x] Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• [x] Tests: Added/updated and all pass
• [x] Localization: All end user facing strings can be localized
• [x] Dev docs: None
• [x] New binaries: None
• [x] Documentation updated: None

Detailed Description of the Pull Request / Additional comments

The following symbols are added, as discussed in #23237 :

• ° (degree sign, U+00B0): added to 0
• ∫ (integral, U+222B): added to s
• ⁝ (vertical ellipsis, U+205D): added to .

The following symbols mentioned in the issue are not added, as they were already present:

• π (pi, U+03C0): already under p
• μ (mu/micro, U+03BC): already under m
• … (horizontal ellipsis, U+2026): already under .
• ≤ (less than or equal, U+2264): already under = and ,
• ≥ (greater than or equal, U+2265): already under = and ,

Validation Steps Performed

Manually tested on Win11.