feat: migrate from Cedar to SpiceDB authorization system

This is a major architectural change that replaces the Cedar policy-based
authorization system with SpiceDB's relation-based authorization.

Key changes:

- Migrate from Rust to Go implementation
- Replace Cedar policies with SpiceDB schema and relationships
- Switch from envoy `ext_authz` with Cedar to SpiceDB permission checks
- Update build system and dependencies for Go ecosystem
- Maintain Envoy integration for external authorization

This change enables more flexible permission modeling through SpiceDB's
Google Zanzibar inspired relation-based system, supporting complex
hierarchical permissions that were difficult to express in Cedar.

Breaking change: Existing Cedar policies and Rust-based configuration
will no longer work and need to be migrated to SpiceDB schema.

1 files changed, 72 insertions, 0 deletions

diff --git a/vendor/github.com/google/yamlfmt/formatters/basic/features.go b/vendor/github.com/google/yamlfmt/formatters/basic/features.go
new file mode 100644
index 00000000..fc933f49
--- /dev/null
+++ b/vendor/github.com/google/yamlfmt/formatters/basic/features.go
@@ -0,0 +1,72 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package basic
+
+import (
+	"github.com/google/yamlfmt"
+	yamlFeatures "github.com/google/yamlfmt/formatters/basic/features"
+	"github.com/google/yamlfmt/internal/features"
+	"github.com/google/yamlfmt/internal/hotfix"
+)
+
+func ConfigureFeaturesFromConfig(config *Config) yamlfmt.FeatureList {
+	lineSep, err := config.LineEnding.Separator()
+	if err != nil {
+		lineSep = "\n"
+	}
+	configuredFeatures := []yamlfmt.Feature{}
+	if config.RetainLineBreaks || config.RetainLineBreaksSingle {
+		configuredFeatures = append(
+			configuredFeatures,
+			hotfix.MakeFeatureRetainLineBreak(lineSep, config.RetainLineBreaksSingle),
+		)
+	}
+	if config.TrimTrailingWhitespace {
+		configuredFeatures = append(
+			configuredFeatures,
+			features.MakeFeatureTrimTrailingWhitespace(lineSep),
+		)
+	}
+	if config.EOFNewline {
+		configuredFeatures = append(
+			configuredFeatures,
+			features.MakeFeatureEOFNewline(lineSep),
+		)
+	}
+	if config.StripDirectives {
+		configuredFeatures = append(
+			configuredFeatures,
+			hotfix.MakeFeatureStripDirectives(lineSep),
+		)
+	}
+	return configuredFeatures
+}
+
+func ConfigureYAMLFeaturesFromConfig(config *Config) yamlFeatures.YAMLFeatureList {
+	var featureList yamlFeatures.YAMLFeatureList
+
+	if config.DisallowAnchors {
+		featureList = append(featureList, yamlFeatures.Check)
+	}
+
+	if config.ForceArrayStyle != "" {
+		featureList = append(
+			featureList,
+			yamlFeatures.FeatureForceSequenceStyle(config.ForceArrayStyle),
+		)
+	}
+
+	return featureList
+}