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.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature / change request
+about: Propose a new feature, pallet, or runtime change
+title: "[feat] "
+labels: ["enhancement"]
+---
+
+## Motivation
+
+<!-- What problem does this solve? Who benefits? -->
+
+## Proposed change
+
+## Component
+
+<!-- relay runtime, system parachain, new/existing pezpallet, framework -->
+
+## Runtime / migration impact
+
+<!-- Does this need a runtime upgrade, storage migration, or new weights? -->