Set up project scaffolding: GitHub Actions workflows, issue templates, changelog, contributing guidelines, MIT license, and README

README.md

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+# terminal-ui
+
+Java library for terminal UI: tables, rules, colors, prompts, menus, SelectList, pager, and more. Fluent API, ANSI support, testable.
+
+[![CI](https://github.com/jakubbbdev/terminal-ui/actions/workflows/ci.yml/badge.svg)](https://github.com/jakubbbdev/terminal-ui/actions/workflows/ci.yml)
+
+## Requirements
+
+- **Java 21**
+- **Gradle 9.x** (wrapper included)
+
+## Build & Test
+
+```bash
+./gradlew build
+```
+
+Run tests:
+
+```bash
+./gradlew test
+```
+
+Demo (non-interactive):
+
+```bash
+./gradlew run
+```
+
+Interactive demo (best run in a real terminal):
+
+```bash
+./gradlew runDemo2
+```
+
+## Usage (excerpt)
+
+```java
+import dev.jakub.terminal.Terminal;
+import dev.jakub.terminal.core.Color;
+
+// Colored text
+Terminal.print("Hello").color(Color.CYAN).bold().println();
+
+// Table
+Terminal.table()
+    .header("A", "B")
+    .row("1", "2")
+    .row("3", "4")
+    .print(System.out);
+
+// Prompt
+String name = Terminal.prompt("Name: ").ask();
+
+// Menu
+String choice = Terminal.menu()
+    .title("Environment")
+    .option("Dev").option("Prod")
+    .select();
+```
+
+## License
+
+See [LICENSE](LICENSE).