Switch To Unassign Glyphs for Regional Indicator Symbol range U+1F1E6 -> U+1F1FF

[vollink]

The problem I'm actually trying to solve:
In macOS both Terminal.app (builtin) and iTerm2 have the ability to show Flag emoji (🇦🇿). However, because Iosevka assigns glyphs to the Regional Indicator Symbol range U+1F1E6 -> U+1F1FF, both terminals just print the glyphs instead of doing the combining. Switch to another font, poof the flag appears, Switch to Iosevka I get little A, Z glyphs.

Solution suggestion:
I'd like a flag in .private_build_plans that could disable this range (as well as an update in the configurator to output this flag).

Alternatives:
At no point would I want anybody's Font to break if they already rely on these glyphs, so I don't think simply removing the assignments would be the "kind thing to do".
I've also considered the good possibility that there's already a way to do this, but I couldn't find it.

Screenshot shows Courier New vs Iosevka showing the sequence for an American Flag (the behavior follows Font, not app).

[jmcwilliams403]

I would like to note that on Windows it eccentrically replaces any valid emoji sequences with emoji unless specifically disabled with U+FE0E, which made it a challenge to actually show images of the plain text forms in my original pull request.

However, as I do not own a mac, I wasn't originally able to test how Mac handles emoji on desktop at the time I implemented these.

Also, out of curiosity, what happens when you put U+FE0F after each character in the sequence?
(not at the end of the entire sequence but after each character individually, so two in total)

[jmcwilliams403]

Also I would like to point out that this example exists in private-build-plans-sample.toml:

# Character Exclusion
# Specify character ranges in the section below to exclude certain characters from the font being
# built. Remove this section when this feature is not needed.

[buildPlans.IosevkaCustom.excludeChars]
ranges = [[10003, 10008]]

[vollink]

Okay, yeah, adding the extra characters works. But hey! There's an exclude ranges thing! Awesome, I'll try that tonight!

It would still be nice if the configurator had this as a callout. Either way, I appreciate the help!

[be5invis]

@jmcwilliams403 I may consider REMOVAL of RIS chars in v32, and maybe other chars that has Emoji_Presentation property.