Contribute back our version of the flag of Ireland

[wyattoday]

See commit 18a27a9

Update flag of Ireland to actually be a reasonable SVG, and fix the colors to match the "Department of the Taoiseach - The National Flag - Guidelines":

https://assets.gov.ie/2949/151118153516-096a94ba6955435cae965414f7667104.pdf

"Orange": PANTONE 151 C, https://www.pantone.com/color-finder/151-C
Hex #FF8200

"Green": PANTONE 347 C, https://www.pantone.com/color-finder/347-C
Hex #009A44

Contribute changes back here: https://commons.wikimedia.org/wiki/File:Flag_of_Ireland.svg