feat: add --tag alias, improve tags output, add management commands

- add --tag alias for --digest in vulns, scan, info, sbom commands
- tags command now shows digest column for each tag
- add delete-repo, delete-project, purge, clean-all commands
- add config command for project settings
- bump version to 0.3.0

.claude/settings.local.json

@@ -0,0 +1,20 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(python3:*)",
+      "Bash(ruff check:*)",
+      "Bash(for f in src/harbor/*.py)",
+      "Bash(do python3 -m py_compile \"$f\")",
+      "Bash(echo:*)",
+      "Bash(done)",
+      "Bash(PYTHONPATH=src python3:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(git push:*)",
+      "Bash(~/git/dotfiles/.local/bin/gitea-ci.py:*)",
+      "Bash(PYTHONPATH=src python:*)",
+      "Bash(pip3 install:*)",
+      "Bash(~/.local/bin/ruff check src/harbor/)"
+    ]
+  }
+}