Created VotesApi project nad re-worked vote rewards handling

src/NadekoBot.VotesApi/README.md

@@ -0,0 +1,46 @@
+## Votes Api
+
+This api is used if you want your bot to be able to reward users who vote for it on discords.com or top.gg   
+
+#### [GET] `/discords/new`
+    Get the discords votes received after previous call to this endpoint.
+    Input full url of this endpoint in your creds.yml file under Discords url field.
+    For example "https://api.my.cool.bot/discords/new"
+#### [GET] `/topgg/new`
+    Get the topgg votes received after previous call to this endpoint.
+    Input full url of this endpoint in your creds.yml file under Topgg url field.
+    For example "https://api.my.cool.bot/topgg/new"
+
+#### [POST] `/discordswebhook`
+    Input this endpoint as the webhook on discords.com bot edit page
+    model: https://docs.botsfordiscord.com/methods/receiving-votes
+    For example "https://api.my.cool.bot/topggwebhook"
+#### [POST] `/topggwebhook`
+    Input this endpoint as the webhook https://top.gg/bot/:your-bot-id/webhooks (replace :your-bot-id with your bot's id)
+    model: https://docs.top.gg/resources/webhooks/#schema
+    For example "https://api.my.cool.bot/discordswebhook"
+
+Input your super-secret header value in appsettings.json's DiscordsKey and TopGGKey fields
+They must match your DiscordsKey and TopGG key respectively, as well as your secrets in the discords.com and top.gg webhook setup pages
+
+Full Example:
+
+⚠ Change TopggKey and DiscordsKey to a secure long string  
+⚠ You can use https://www.random.org/strings/?num=1&len=20&digits=on&upperalpha=on&loweralpha=on&unique=on&format=html&rnd=new to generate it
+
+`creds.yml`
+```yml
+votes:
+    TopggServiceUrl: "https://api.my.cool.bot/topgg"
+    TopggKey: "my_topgg_key"
+    DiscordsServiceUrl: "https://api.my.cool.bot/discords"
+    DiscordsKey: "my_discords_key"
+```
+
+`appsettings.json`
+```json
+...
+  "DiscordsKey": "my_discords_key",
+  "TopGGKey": "my_topgg_key",
+...
+```