Initial rebrand: @polkadot -> @pezkuwi (3 packages)

- Package namespace: @polkadot/dev -> @pezkuwi/dev
- Repository: polkadot-js/dev -> pezkuwichain/pezkuwi-dev
- Author: Pezkuwi Team <team@pezkuwichain.io>

Packages:
- @pezkuwi/dev (build tools, linting, CI scripts)
- @pezkuwi/dev-test (test runner)
- @pezkuwi/dev-ts (TypeScript build)

Upstream: polkadot-js/dev v0.83.3

.gitignore

@@ -0,0 +1,23 @@
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.npmrc
+.pnp.*
+.yarn/*
+!.yarn/releases
+!.yarn/plugins
+!.yarn/sdks
+/mod.ts
+/import_map.json
+build/
+build-*/
+cc-test-reporter
+coverage/
+node_modules/
+npm-debug.log*
+tmp/
+tsconfig.*buildinfo
+yarn-debug.log*
+yarn-error.log*