feat: Basic structs

- Added Account struct
- Added Config struct
- Added empty Map struct
- Added Quest struct

src/account/mod.rs

@@ -0,0 +1,24 @@
+//! Module for handling user accounts
+
+use serde::{ Serialize, Deserialize };
+
+fn default_id() -> String {
+    "none".to_string()
+}
+
+/// User account struct, which can be (de-)serialized from/into TOML
+#[derive(Serialize, Deserialize)]
+pub struct Account {
+    
+    /// User id, specific to used service
+    #[serde(default = "default_id")]
+    pub id: String,
+    
+    /// User balance,
+    #[serde(default)]
+    pub balance: u32,
+
+    /// Id of room node where user is located
+    #[serde(default)]
+    pub location: u16
+}