docs: add Profiles section with multi-profile config example

Co-authored-by: aider (openai/gpt-5) <aider@aider.chat>

README.md

@@ -53,6 +53,39 @@ cookies_file = "/path/to/your/apple-music-cookies-file.txt"
 - `nas_path`: The destination path on your NAS or local filesystem.
 - `cookies_file`: The path to your Apple Music cookies file for `gamdl`.
 
+## Profiles
+
+`jamdl` supports multiple profiles so you can target different destinations (NAS paths, hosts, or local folders) without editing the config each time. Profiles live under a top-level `[profiles]` table. The profile named `default` is used when no `--profile` is specified.
+
+Example multi-profile configuration:
+```toml
+# Multi-profile configuration for jamdl
+
+[profiles.default]
+nas_host = "localhost"
+nas_user = "your_ssh_user"
+nas_path = "/path/on/nas"
+cookies_file = "/path/to/your/apple-music-cookies-file.txt"
+
+[profiles.work]
+nas_host = "work-nas"
+nas_user = "alice"
+nas_path = "/srv/media/music"
+cookies_file = "/home/alice/apple-cookies.txt"
+
+[profiles.laptop]
+nas_host = "localhost"
+nas_user = "your_ssh_user"
+nas_path = "/Users/you/Music"
+cookies_file = "/Users/you/cookies.txt"
+```
+
+- Choose a profile when running `jamdl`:
+  - `jamdl --profile work "https://music.apple.com/us/album/some-album/123456789"`
+  - Short form: `jamdl -p work "https://music.apple.com/us/album/some-album/123456789"`
+- If the requested profile is missing, `jamdl` falls back to `default` and lists available profiles.
+- Backwards compatibility: legacy single-profile configs (top-level keys without `[profiles]`) are still supported.
+
 ## Usage
 
 Once configured, you can download media by passing a URL to `jamdl`: