feat: initialize thoughts-frontend with Next.js, TypeScript, and ESLint

- Add ESLint configuration for Next.js and TypeScript support.
- Create Next.js configuration file with standalone output option.
- Initialize package.json with scripts for development, build, and linting.
- Set up PostCSS configuration for Tailwind CSS.
- Add SVG assets for UI components.
- Create TypeScript configuration for strict type checking and module resolution.

thoughts-backend/app/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "app"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[lib]
+name = "app"
+path = "src/lib.rs"
+
+[dependencies]
+models = { path = "../models" }
+
+sea-orm = { workspace = true }