Complete piglet implementation with animations and effects

- Implement complete animation system with 20+ motion effects
- Add 18+ easing functions (quad, cubic, elastic, back, bounce)
- Implement color system with palette and gradient support
- Add parser for durations, colors, and CSS gradients
- Create comprehensive test suite (14 tests passing)
- Add linting and formatting with clippy/rustfmt
- Support for figlet integration with custom fonts
- Terminal rendering with crossterm
- Fix all clippy warnings and lint issues

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

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

src/color/palette.rs

@@ -1,8 +1,53 @@
-"#ffff00".to_string(),
-        ]).unwrap()
+use crate::parser::color::Color;
+use anyhow::Result;
+
+#[derive(Debug, Clone)]
+pub struct ColorPalette {
+    colors: Vec<Color>,
+}
+
+impl ColorPalette {
+    pub fn new(colors: Vec<Color>) -> Self {
+        Self { colors }
     }
-    
+
+    pub fn from_strings(color_strs: &[String]) -> Result<Self> {
+        let colors: Result<Vec<Color>> = color_strs.iter().map(|s| Color::parse(s)).collect();
+        Ok(Self::new(colors?))
+    }
+
+    pub fn get_color(&self, index: usize) -> Color {
+        if self.colors.is_empty() {
+            return Color::new(255, 255, 255);
+        }
+        self.colors[index % self.colors.len()]
+    }
+
+    pub fn len(&self) -> usize {
+        self.colors.len()
+    }
+
+    #[allow(dead_code)]
+    pub fn is_empty(&self) -> bool {
+        self.colors.is_empty()
+    }
+
+    /// Create rainbow palette
+    pub fn rainbow() -> Self {
+        Self::from_strings(&[
+            "#ff0000".to_string(),
+            "#ff7f00".to_string(),
+            "#ffff00".to_string(),
+            "#00ff00".to_string(),
+            "#0000ff".to_string(),
+            "#4b0082".to_string(),
+            "#9400d3".to_string(),
+        ])
+        .unwrap()
+    }
+
     /// Create ocean palette
+    #[allow(dead_code)]
     pub fn ocean() -> Self {
         Self::from_strings(&[
             "#000080".to_string(),
@@ -10,7 +55,8 @@
             "#4169e1".to_string(),
             "#87ceeb".to_string(),
             "#add8e6".to_string(),
-        ]).unwrap()
+        ])
+        .unwrap()
     }
 }
 
@@ -18,4 +64,4 @@ impl Default for ColorPalette {
     fn default() -> Self {
         Self::rainbow()
     }
-}
+}