Add role hoisting / ranking.

Add bot creation for #8.

src/database/entities/bots.rs

@@ -0,0 +1,12 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Bot {
+    #[serde(rename = "_id")]
+    pub id: String,
+    pub owner: String,
+    pub token: String,
+    pub public: bool,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub interactions_url: Option<String>,
+}