Add Help component for CLI usage and input validation support

- Introduced `Help` class for generating CLI help/usage blocks with options, descriptions, and customizable formatting.
- Enhanced `Prompt` and `PromptBuilder` with validation capabilities using predicates and retry messages.
- Added terminal control methods `clearScreen` and `cursorTo` with ANSI support.
- Updated examples and documentation (`Examples.md`, `Components.md`) to showcase the new features.
- Extended `Examples` class with a `helpBlock` method for demonstrating the `Help` usage.

src/main/java/dev/jakub/terminal/example/Examples.java

@@ -24,6 +24,7 @@ public final class Examples {
         columns();
         steps();
         breadcrumb();
+        helpBlock();
         log();
         logWithMinLevel();
         diff();
@@ -128,6 +129,17 @@ public final class Examples {
         System.out.println();
     }
 
+    static void helpBlock() {
+        Terminal.print("=== Help (CLI usage) ===").color(Color.CYAN).bold().println();
+        Terminal.help()
+                .title("Options")
+                .option("-v, --verbose", "Enable verbose output")
+                .option("-h, --help", "Show this help")
+                .option("--file <path>", "Input file path")
+                .print(System.out);
+        System.out.println();
+    }
+
     static void log() {
         Terminal.print("=== Log ===").color(Color.CYAN).bold().println();
         Terminal.log()