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, 17 deletions

diff --git a/vendor/icu_normalizer_data/src/lib.rs b/vendor/icu_normalizer_data/src/lib.rs
deleted file mode 100644
index 15589969..00000000
--- a/vendor/icu_normalizer_data/src/lib.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-// This file is part of ICU4X. For terms of use, please see the file
-// called LICENSE at the top level of the ICU4X source tree
-// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
-
-//! Data for the `icu_normalizer` crate
-//!
-//! This data was generated with CLDR version 47.0.0, ICU version icu4x/2025-05-01/77.x, and
-//! LSTM segmenter version v0.1.0.
-
-#![no_std]
-// The source is not readable and is massive as HTML.
-#![doc(html_no_source)]
-
-#[cfg(icu4x_custom_data)]
-include!(concat!(core::env!("ICU4X_DATA_DIR"), "/mod.rs"));
-#[cfg(not(icu4x_custom_data))]
-include!("../data/mod.rs");