Add LICENSE.md

[loimabean]

I love this site - I used it to get one myself :) - but currently, there is no license in this repository, meaning by default it is ARR (All Rights Reserved). That is a fine license if that is your intention! But, adding a license will clarify how exactly this code can be referenced or used by others <3

[makidoll]

oh no haha. i usually add a license but i guess i forgot. maybe i should rebase in an early commit. usually i go with gpl or agpl for server stuff, which i hope is alright. thanks for letting me know ^^ im glad you like it. ive been learning svelte recently and might port this to sveltekit!

[loimabean]

agpl is my preference for server stuff too! no problem, thanks for the quick response and good luck 🧡