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, 55 insertions, 0 deletions

diff --git a/vendor/github.com/google/yamlfmt/formatters/basic/config.go b/vendor/github.com/google/yamlfmt/formatters/basic/config.go
new file mode 100644
index 00000000..2a32d050
--- /dev/null
+++ b/vendor/github.com/google/yamlfmt/formatters/basic/config.go
@@ -0,0 +1,55 @@
+// 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 (
+	"runtime"
+
+	"github.com/google/yamlfmt"
+	yamlFeatures "github.com/google/yamlfmt/formatters/basic/features"
+)
+
+type Config struct {
+	Indent                    int                        `mapstructure:"indent"`
+	IncludeDocumentStart      bool                       `mapstructure:"include_document_start"`
+	LineEnding                yamlfmt.LineBreakStyle     `mapstructure:"line_ending"`
+	LineLength                int                        `mapstructure:"max_line_length"`
+	RetainLineBreaks          bool                       `mapstructure:"retain_line_breaks"`
+	RetainLineBreaksSingle    bool                       `mapstructure:"retain_line_breaks_single"`
+	DisallowAnchors           bool                       `mapstructure:"disallow_anchors"`
+	ScanFoldedAsLiteral       bool                       `mapstructure:"scan_folded_as_literal"`
+	IndentlessArrays          bool                       `mapstructure:"indentless_arrays"`
+	DropMergeTag              bool                       `mapstructure:"drop_merge_tag"`
+	PadLineComments           int                        `mapstructure:"pad_line_comments"`
+	TrimTrailingWhitespace    bool                       `mapstructure:"trim_trailing_whitespace"`
+	EOFNewline                bool                       `mapstructure:"eof_newline"`
+	StripDirectives           bool                       `mapstructure:"strip_directives"`
+	ArrayIndent               int                        `mapstructure:"array_indent"`
+	IndentRootArray           bool                       `mapstructure:"indent_root_array"`
+	DisableAliasKeyCorrection bool                       `mapstructure:"disable_alias_key_correction"`
+	ForceArrayStyle           yamlFeatures.SequenceStyle `mapstructure:"force_array_style"`
+}
+
+func DefaultConfig() *Config {
+	lineBreakStyle := yamlfmt.LineBreakStyleLF
+	if runtime.GOOS == "windows" {
+		lineBreakStyle = yamlfmt.LineBreakStyleCRLF
+	}
+	return &Config{
+		Indent:          2,
+		LineEnding:      lineBreakStyle,
+		PadLineComments: 1,
+	}
+}