Add comprehensive --help documentation and --version flag

Features:
- Enhanced main CLI help with workflow guide and examples
- Added --version flag to show CLI and OpenAI SDK versions
- Improved command descriptions with:
  - Clear parameter explanations
  - Practical usage examples
  - Prerequisite notes
  - Consistent formatting

Benefits:
- Improves accessibility for new users
- Self-documenting CLI interface
- No external documentation needed for basic usage
- Shows typical workflow (search → download → generate)

Addresses feature request for built-in help command.

Author: SL-Mar

quantcli/cli.py

@@ -20,19 +20,50 @@
 
 @click.group()
 @click.option('--verbose', is_flag=True, help='Enables verbose mode.')
+@click.option('--version', is_flag=True, help='Show version information.')
 @click.pass_context
-def cli(ctx, verbose):
+def cli(ctx, verbose, version):
     """
-    QuantCoder CLI Tool
+    QuantCoder CLI - Generate QuantConnect Trading Algorithms from Research Articles
+    
+    QuantCoder uses NLP and LLMs to transform academic research articles into 
+    executable trading algorithms for the QuantConnect platform.
+    
+    WORKFLOW:
+    
+        1. Search for articles:     quantcli search "momentum trading"
+        2. List found articles:     quantcli list
+        3. Download article PDF:    quantcli download 1
+        4. Summarize article:       quantcli summarize 1
+        5. Generate trading code:   quantcli generate-code 1
+    
+    INTERACTIVE MODE:
+    
+        quantcli interactive        Launch GUI for guided workflow
+    
+    For help on a specific command:
+    
+        quantcli <command> --help
+    
+    Examples:
+    
+        quantcli search "algorithmic trading" --num 5
+        quantcli download 1
+        quantcli generate-code 1
     """
+    if version:
+        click.echo("QuantCoder CLI v0.3 (Legacy)")
+        click.echo("Using OpenAI SDK v0.28")
+        ctx.exit()
+        
     setup_logging(verbose)
     load_api_key()
     ctx.ensure_object(dict)
     ctx.obj['VERBOSE'] = verbose
 
 @cli.command()
 def hello():
-    """A simple command to test the CLI."""
+    """Test command to verify CLI installation."""
     logger.info("Executing hello command")
     click.echo("Hello from QuantCLI!")
 
@@ -41,10 +72,14 @@ def hello():
 @click.option('--num', default=5, help='Number of results to return')
 def search(query, num):
     """
-    Search for articles based on QUERY.
+    Search for academic articles using CrossRef API.
+    
+    QUERY: Search keywords (e.g., "momentum trading", "mean reversion")
+    
+    Examples:
     
-    Example:
         quantcli search "algorithmic trading" --num 3
+        quantcli search "pairs trading strategies" --num 10
     """
     logger.info(f"Searching for articles with query: {query}, number of results: {num}")
     articles = search_crossref(query, rows=num)
@@ -67,7 +102,10 @@ def search(query, num):
 @cli.command()
 def list():
     """
-    List previously searched articles.
+    List previously searched articles from the current session.
+    
+    Displays all articles from the most recent search operation.
+    Articles are saved in articles.json.
     """
     if not os.path.exists(ARTICLES_FILE):
         click.echo("No articles found. Please perform a search first.")
@@ -86,10 +124,13 @@ def list():
 @click.argument('article_id', type=int)
 def download(article_id):
     """
-    Download an article's PDF by ARTICLE_ID.
+    Download an article's PDF by its list position.
+
+    ARTICLE_ID: The number shown in the 'list' command (1, 2, 3, etc.)
 
     Example:
-        quantcli download 1
+    
+        quantcli download 1    # Downloads the first article from your search
     """
     if not os.path.exists(ARTICLES_FILE):
         click.echo("No articles found. Please perform a search first.")
@@ -122,9 +163,15 @@ def download(article_id):
 @click.argument('article_id', type=int)
 def summarize(article_id):
     """
-    Summarize a downloaded article by ARTICLE_ID.
+    Generate an AI summary of a downloaded article.
+
+    ARTICLE_ID: The number of the article to summarize
+    
+    The article must be downloaded first using the 'download' command.
+    Summary is saved to downloads/article_<ID>_summary.txt
 
     Example:
+    
         quantcli summarize 1
     """
     filepath = os.path.join(DOWNLOADS_DIR, f"article_{article_id}.pdf")
@@ -154,9 +201,17 @@ def summarize(article_id):
 @click.argument('article_id', type=int)
 def generate_code_cmd(article_id):
     """
-    Generate QuantConnect code from a summarized article.
+    Generate a QuantConnect trading algorithm from an article.
+
+    ARTICLE_ID: The number of the article to process
+    
+    Extracts trading strategy logic from the article and generates
+    executable Python code for the QuantConnect platform.
+    
+    Output is saved to generated_code/algorithm_<ID>.py
 
     Example:
+    
         quantcli generate-code 1
     """
     filepath = os.path.join(DOWNLOADS_DIR, f"article_{article_id}.pdf")
@@ -187,9 +242,12 @@ def generate_code_cmd(article_id):
 @click.argument('article_id', type=int)
 def open_article(article_id):
     """
-    Open the article's URL in the default web browser.
+    Open the article's webpage in your default browser.
+
+    ARTICLE_ID: The number of the article to open
 
     Example:
+    
         quantcli open-article 1
     """
     if not os.path.exists(ARTICLES_FILE):
@@ -208,7 +266,15 @@ def open_article(article_id):
 @cli.command()
 def interactive():
     """
-    Perform an interactive search and process with a GUI.
+    Launch the interactive GUI for a guided workflow.
+    
+    The GUI provides a visual interface for:
+    - Searching articles
+    - Viewing search results
+    - Downloading PDFs
+    - Generating summaries and code
+    
+    Recommended for first-time users.
     """
     click.echo("Starting interactive mode...")
     launch_gui()  # Call the launch_gui function to run the GUI