feat: initial commit — unarr CLI

Search, inspect, stream, and download torrents from the terminal.
Replaces the entire *arr stack with a single binary.

internal/config/paths.go

@@ -0,0 +1,58 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+const appName = "unarr"
+
+// Dir returns the configuration directory following XDG conventions.
+//   - Linux:   ~/.config/unarr
+//   - macOS:   ~/Library/Application Support/unarr
+//   - Windows: %APPDATA%/unarr
+//
+// Overridable via UNARR_CONFIG_DIR env var.
+func Dir() string {
+	if d := os.Getenv("UNARR_CONFIG_DIR"); d != "" {
+		return d
+	}
+	switch runtime.GOOS {
+	case "darwin":
+		home, _ := os.UserHomeDir()
+		return filepath.Join(home, "Library", "Application Support", appName)
+	case "windows":
+		return filepath.Join(os.Getenv("APPDATA"), appName)
+	default: // linux, freebsd, etc.
+		if xdg := os.Getenv("XDG_CONFIG_HOME"); xdg != "" {
+			return filepath.Join(xdg, appName)
+		}
+		home, _ := os.UserHomeDir()
+		return filepath.Join(home, ".config", appName)
+	}
+}
+
+// FilePath returns the full path to the config file.
+func FilePath() string {
+	return filepath.Join(Dir(), "config.toml")
+}
+
+// DataDir returns the data directory for logs, cache, etc.
+//   - Linux:   ~/.local/share/unarr
+//   - macOS:   ~/Library/Application Support/unarr
+//   - Windows: %LOCALAPPDATA%/unarr
+func DataDir() string {
+	switch runtime.GOOS {
+	case "darwin":
+		return Dir() // macOS uses same dir for config and data
+	case "windows":
+		return filepath.Join(os.Getenv("LOCALAPPDATA"), appName)
+	default:
+		if xdg := os.Getenv("XDG_DATA_HOME"); xdg != "" {
+			return filepath.Join(xdg, appName)
+		}
+		home, _ := os.UserHomeDir()
+		return filepath.Join(home, ".local", "share", appName)
+	}
+}