Initial commit: Piglet - Animated figlet wrapper

Add complete Rust implementation with:
- 20+ motion effects (fade, slide, scale, typewriter, wave, bounce, etc.)
- 18+ easing functions (linear, quad, cubic, elastic, back, bounce)
- Color support (CSS4 colors, hex codes, gradients)
- Figlet integration with custom fonts and options
- Cross-platform support (Linux, macOS, Windows)
- Comprehensive CI/CD workflows
- Full test suite with integration tests
- Documentation (README.md, CLAUDE.md)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/color/gradient.rs

@@ -0,0 +1,26 @@
+use crate::parser::gradient::Gradient;
+use crate::parser::color::Color;
+use anyhow::Result;
+
+pub struct GradientEngine {
+    gradient: Gradient,
+}
+
+impl GradientEngine {
+    pub fn new(gradient: Gradient) -> Self {
+        Self { gradient }
+    }
+    
+    pub fn from_string(gradient_str: &str) -> Result<Self> {
+        let gradient = Gradient::parse(gradient_str)?;
+        Ok(Self::new(gradient))
+    }
+    
+    pub fn color_at(&self, t: f64) -> Color {
+        self.gradient.color_at(t)
+    }
+    
+    pub fn colors(&self, steps: usize) -> Vec<Color> {
+        self.gradient.colors(steps)
+    }
+}