feat: Support artist - song format in command line arguments

Updated the CLI to accept arguments in two formats:
1. Single argument with dash separator: "ARTIST - SONG"
2. Two separate arguments: ARTIST SONG

This makes it more convenient for users to input artist and song information.
Also updated README to document both usage formats.

README.md

@@ -28,8 +28,14 @@ A Python package to fetch song lyrics from [paroles.net](https://www.paroles.net
 
 ### Command Line Interface
 
-After installation, you can use the command line interface:
+After installation, you can use the command line interface with two formats:
 
+1. Single argument with dash separator:
+```bash
+paroles-scraper "Artist Name - Song Title"
+```
+
+2. Two separate arguments:
 ```bash
 paroles-scraper "Artist Name" "Song Title"
 ```
@@ -37,6 +43,7 @@ paroles-scraper "Artist Name" "Song Title"
 ### Examples
 
 ```bash
+paroles-scraper "SCORPIONS - SEND ME AN ANGEL"
 paroles-scraper "Ed Sheeran" "Shape of You"
 paroles-scraper "Imagine Dragons" "Believer"
 ```

paroles_net_scraper/paroles_net_scraper.py

@@ -125,25 +125,44 @@ def search_song(artist, song_title):
 
 def main():
     parser = argparse.ArgumentParser(description='Fetch song lyrics from paroles.net')
-    parser.add_argument('artist', help='Artist name')
-    parser.add_argument('song', help='Song title')
+    parser.add_argument('query', help='Artist and song in format "ARTIST - SONG TITLE" or separate artist and song arguments')
+    parser.add_argument('song', nargs='?', help='Song title (optional if using ARTIST - SONG format)')
     parser.add_argument('--search', action='store_true', help='Use search functionality instead of direct URL construction')
     
     args = parser.parse_args()
     
+    # Handle both input formats:
+    # 1. Single argument: "ARTIST - SONG TITLE"
+    # 2. Two arguments: ARTIST SONG_TITLE
+    if args.song is None:
+        # Single argument format: split on " - "
+        if " - " in args.query:
+            artist, song = args.query.split(" - ", 1)
+        else:
+            print("Error: Please provide artist and song in format 'ARTIST - SONG TITLE'")
+            return
+    else:
+        # Two argument format: artist and song provided separately
+        artist = args.query
+        song = args.song
+    
+    # Strip any leading/trailing whitespace
+    artist = artist.strip()
+    song = song.strip()
+    
     if args.search:
         # First search for the song to get the correct URL
-        search_result = search_song(args.artist, args.song)
+        search_result = search_song(artist, song)
         if search_result.startswith("http"):
             # Extract artist and song from the URL
             print(f"Found song at: {search_result}")
             # For simplicity, we'll still call get_song_lyrics with original params
-            lyrics = get_song_lyrics(args.artist, args.song)
+            lyrics = get_song_lyrics(artist, song)
             print(lyrics)
         else:
             print(search_result)  # Print error message
     else:
-        lyrics = get_song_lyrics(args.artist, args.song)
+        lyrics = get_song_lyrics(artist, song)
         print(lyrics)