fix: unify scraper argument interface and fix create command forwarding

All scrapers (scrape, github, analyze, pdf) now share a common argument
contract via add_all_standard_arguments() in arguments/common.py.
Universal flags (--dry-run, --verbose, --quiet, --name, --description,
workflow args) work consistently across all source types.

Previously, `create <url> --dry-run`, `create owner/repo --dry-run`,
and `create ./path --dry-run` would crash because sub-scrapers didn't
accept those flags. Also fixes main.py _handle_analyze_command() not
forwarding --dry-run, --preset, --quiet, --name, --description to
codebase_scraper.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/skill_seekers/cli/main.py

@@ -305,6 +305,30 @@ def _handle_analyze_command(args: argparse.Namespace) -> int:
         sys.argv.append("--no-comments")
     if args.verbose:
         sys.argv.append("--verbose")
+    if getattr(args, "quiet", False):
+        sys.argv.append("--quiet")
+    if getattr(args, "dry_run", False):
+        sys.argv.append("--dry-run")
+    if getattr(args, "preset", None):
+        sys.argv.extend(["--preset", args.preset])
+    if getattr(args, "name", None):
+        sys.argv.extend(["--name", args.name])
+    if getattr(args, "description", None):
+        sys.argv.extend(["--description", args.description])
+    if getattr(args, "api_key", None):
+        sys.argv.extend(["--api-key", args.api_key])
+    # Enhancement Workflow arguments
+    if getattr(args, "enhance_workflow", None):
+        for wf in args.enhance_workflow:
+            sys.argv.extend(["--enhance-workflow", wf])
+    if getattr(args, "enhance_stage", None):
+        for stage in args.enhance_stage:
+            sys.argv.extend(["--enhance-stage", stage])
+    if getattr(args, "workflow_var", None):
+        for var in args.workflow_var:
+            sys.argv.extend(["--var", var])
+    if getattr(args, "workflow_dry_run", False):
+        sys.argv.append("--workflow-dry-run")
 
     try:
         result = analyze_main() or 0