add funding options

.github/FUNDING.yml

@@ -0,0 +1,6 @@
+# These are supported funding model platforms
+ko_fi: rudokhvist
+custom: ["https://www.paypal.com/donate/?business=SX99L4RVR8ZKS&no_recurring=0&item_name=Your+donations+help+me+to+keep+working+on+existing+and+future+plugins+for+ASF.+I+really+appreciate+this%21&currency_code=USD",
+         "https://www.blockchain.com/explorer/addresses/btc/bc1q8f3zcss5j6gq7hpvum0nzxvfgnm5f8mtxflfxh",
+         "https://litecoinblockexplorer.net/address/LRFrKDFhyEgv7PKb2vFrdYBP7ibUg898Vk",
+         "https://steamcommunity.com/tradeoffer/new/?partner=95843925&token=NTWfCz_R"]