Refactor project structure and enhance type definitions; update installation command in README, add mod.ts for exports, and improve type annotations in context and db modules
···11+export * from "./constants.ts";
22+export * from "./context.ts";
33+export * from "./db.ts";
44+export * from "./network.ts";
55+export * from "./state.ts";
66+export * from "./types.ts";
77+export * from "./utils.ts";