refactor: per-type resources + simplified classification model

Resources renamed from artifactapi_remote to per-type:
- artifactapi_remote_generic
- artifactapi_remote_docker (with ban_tags)
- artifactapi_remote_helm
- artifactapi_remote_pypi
- artifactapi_remote_npm
- artifactapi_remote_rpm
- artifactapi_remote_alpine
- artifactapi_remote_puppet
- artifactapi_remote_terraform (with releases_remote)
- artifactapi_remote_goproxy

Classification simplified:
- patterns: paths to proxy (empty = all, acts as allowlist)
- blocklist: paths to deny (checked first)
- mutable_patterns: override provider auto-classification
- immutable_patterns: override provider auto-classification
- Provider handles mutability automatically per package type

internal/provider/provider.go

@@ -57,7 +57,16 @@ func (p *ArtifactAPIProvider) Configure(ctx context.Context, req provider.Config
 
 func (p *ArtifactAPIProvider) Resources(_ context.Context) []func() resource.Resource {
 	return []func() resource.Resource{
-		NewRemoteResource,
+		newRemoteResource("generic"),
+		newRemoteResource("docker"),
+		newRemoteResource("helm"),
+		newRemoteResource("pypi"),
+		newRemoteResource("npm"),
+		newRemoteResource("rpm"),
+		newRemoteResource("alpine"),
+		newRemoteResource("puppet"),
+		newRemoteResource("terraform"),
+		newRemoteResource("goproxy"),
 		NewVirtualResource,
 	}
 }