feat/web: Patchset 3 (#455)

https://apifox.com/apidoc/shared-ceda7a60-e817-4ea8-827b-de4e874dc45e

implement all backend API

easytier-web/src/db/entity/tower_sessions.rs

@@ -0,0 +1,19 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 1.1.0
+
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq, Serialize, Deserialize)]
+#[sea_orm(table_name = "tower_sessions")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false, column_type = "Text")]
+    pub id: String,
+    #[sea_orm(column_type = "Blob")]
+    pub data: Vec<u8>,
+    pub expiry_date: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}