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, 0 insertions, 32 deletions

diff --git a/Cargo.toml b/Cargo.toml
deleted file mode 100644
index 0a3f3483..00000000
--- a/Cargo.toml
+++ /dev/null
@@ -1,32 +0,0 @@
-[package]
-name = "authzd"
-version = "0.1.0"
-edition = "2024"
-
-[[bin]]
-name = "authzd"
-path = "src/bin/cli.rs"
-
-[lib]
-name = "authzd"
-path = "src/lib.rs"
-
-[dependencies]
-cedar-policy = "4.4.1"
-clap = { version = "4.5", features = ["derive", "env"] }
-envoy-types = "0.6.0"
-log = "0.4.27"
-please = { git = "https://github.com/xlgmokha/please.git", version = "0.1.0" }
-reqwest = { version = "0.12", features = ["json"] }
-serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
-tokio = { version = "1.0.0", features = ["macros", "rt-multi-thread"] }
-tonic = "0.13.1"
-tracing = "0.1"
-tracing-subscriber = { version = "0.3", features = ["json"] }
-urlencoding = "2.1"
-
-[dev-dependencies]
-tokio-stream = "0.1"
-tokio-test = "0.4.0"
-tonic-build = "0.10.0"