feat: add Default to catppuccin

pkg/catppuccin/README.md

@@ -14,3 +14,39 @@ flavors. The theme comes in one light and three dark variants.
 
 * 🍀 *Mocha* is the original and the darkest variant, offering a cozy feeling
   with color-rich accents.
+
+## Usage
+
+Use `go get` to download the dependency.
+
+```bash
+go get github.com/op/redlog/pkg/catppuccin@latest
+```
+
+Then, `import` it in Go files:
+
+```go
+import (
+  "github.com/charmbracelet/log"
+  "github.com/op/redlog/pkg/catppuccin"
+)
+```
+
+The package comes with a `Default` you can use.
+
+```go
+log.SetStyles(catppuccin.Default.Styles)
+slog.SetDefault(slog.New(log.Default()))
+```
+
+To use a specific variant, request it by name.
+
+```go
+// logger always uses Macchiato
+logger := log.New(os.Stderr)
+logger.SetStyles(catppuccin.Macchiato.Styles)
+
+// update default styles to use an adaptive theme
+variant := catppuccin.Adaptive(catppuccin.Latte, catppuccin.Mocha)
+log.SetStyles(catppuccin.New(variant))
+```

pkg/catppuccin/theme.go

@@ -21,6 +21,10 @@ var Theme = logtheme.New(
 	},
 )
 
+// Default is the default Catppuccin variant which is an adaptive flavour using
+// Latte for light backgrounds and Mocha for dark backgrounds.
+var Default = Theme.Default
+
 func hexColor(c lipgloss.TerminalColor) string {
 	if c, ok := c.(lipgloss.Color); ok {
 		hex := string(c)