sync: mirror deployed github repo (chains + sanitized bridge), keep GitLab CI

Make this monorepo's tracked tree identical to the deployed github repo
(github.com/pezkuwichain/pezkuwi-DKS): all RC/AH/People runtimes and framework
carry the mainnet fixes (incl. U128CurrencyToVote everywhere, so the staking
election stall cannot recur), and tools/usdt-bridge matches the current,
public-safe custody tooling (real config/deploy units gitignored, secret-file
locations and server IPs stripped, sanitized *.example templates committed).

Only exception to the mirror: GitLab-native CI is preserved (.gitlab-ci.yml and
.gitlab/), to be rebuilt to match the github CI pipeline in a follow-up.

vendor/arrayvec/README.md

@@ -0,0 +1,27 @@
+
+arrayvec
+========
+[![Crates.io: arrayvec](https://img.shields.io/crates/v/arrayvec.svg)](https://crates.io/crates/arrayvec)
+[![Documentation](https://docs.rs/arrayvec/badge.svg)](https://docs.rs/arrayvec)
+[![Build Status](https://github.com/bluss/arrayvec/workflows/Continuous%20integration/badge.svg?branch=master)](https://github.com/bluss/arrayvec/actions)
+
+
+
+
+[![License: Apache](https://img.shields.io/badge/License-Apache%202.0-red.svg)](LICENSE-APACHE)
+OR
+[![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
+
+A vector with fixed capacity.
+
+Please read the [`API documentation here`](https://docs.rs/arrayvec)
+
+# License
+
+Dual-licensed to be compatible with the Rust project.
+
+Licensed under the Apache License, Version 2.0
+http://www.apache.org/licenses/LICENSE-2.0 or the MIT license
+http://opensource.org/licenses/MIT, at your
+option. This file may not be copied, modified, or distributed
+except according to those terms.