Add comprehensive documentation for terminal-ui

- Introduced new documentation files: `Components.md`, `Examples.md`, `Home.md`, `Install.md`, and `index.md`.
- Provided detailed guides on usage, examples, installation, and API components.
- Linked GitHub Pages and repository resources for easy navigation.

docs/index.md

@@ -0,0 +1,10 @@
+# terminal-ui
+
+Java library for terminal UIs: tables, prompts, menus, and more.
+
+- **[Home](Home)** – overview
+- **[Install](Install)** – Gradle / Maven
+- **[Components](Components)** – what's in the library
+- **[Examples](Examples)** – runnable code snippets
+
+[GitHub repo](https://github.com/jakubbbdev/terminal-ui) · [Releases](https://github.com/jakubbbdev/terminal-ui/releases) · [Packages](https://github.com/jakubbbdev/terminal-ui/packages)