Add "Founding Anniversary Medal" to options to commemorative medals when creating catalog entries for exonumia

I think it would be very beneficial to add a category for "Founding Anniversary Medals" (or some better phrase) under the Commemorative Medals section in exonumia. This category would be for medals commemorating centennials, bicentennials, etc. of cities, states, countries, etc. Here a few examples where this category would apply:

https://en.numista.com/catalogue/exonumia192176.html
https://en.numista.com/catalogue/exonumia190531.html
https://en.numista.com/catalogue/exonumia262207.html
https://en.numista.com/catalogue/exonumia179742.html
https://en.numista.com/catalogue/exonumia179740.html

"Founding Aniversary medals" are classified in numista as two aptions-
1.inaugaration medals-medals commemorating inaugarations
2. historic medals-medals commemorating historic events,personalities,locations etc

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