Create schema for the API (#28)

* feat(schema): add basic structs for schema

* feat(schema): implement base62 id parsing

* docs(schema): add documentation for schema structs
fix(schema): prevent integer overflow in base62 decoding

* refactor(schema): move ids into submodules, reexport from ids mod

* feat(schema): add random generation of base62 ids
style: run rustfmt

src/models/teams.rs

@@ -0,0 +1,33 @@
+use super::ids::Base62Id;
+use serde::{Deserialize, Serialize};
+
+/// The ID of a specific user, encoded as base62 for usage in the API
+#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(from = "Base62Id")]
+#[serde(into = "Base62Id")]
+pub struct UserId(pub u64);
+
+/// The ID of a team
+#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(from = "Base62Id")]
+#[serde(into = "Base62Id")]
+pub struct TeamId(pub u64);
+
+// TODO: permissions, role names, etc
+/// A team of users who control a mod
+#[derive(Serialize, Deserialize)]
+pub struct Team {
+    /// The id of the team
+    pub id: TeamId,
+    /// A list of the members of the team
+    pub members: Vec<TeamMember>,
+}
+
+/// A member of a team
+#[derive(Serialize, Deserialize)]
+pub struct TeamMember {
+    /// The ID of the user associated with the member
+    pub user_id: UserId,
+    /// The name of the user
+    pub name: String,
+}