Initial rebrand from paritytech/subxt to pezkuwichain/pezkuwi-subxt

- Renamed all subxt crates to pezkuwi-subxt
- Updated internal references
- Configured for Pezkuwi ecosystem

examples/wasm-example/README.md

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+# wasm-example
+
+This is a small WASM app using the Yew UI framework to showcase how to use Subxt's features in a WASM environment.
+
+To run the app locally we first install Trunk, a WASM bundler:
+
+```
+cargo install --locked trunk
+```
+
+You need to have a local polkadot/substrate node with it's JSON-RPC HTTP server running at 127.0.0.1:9933 in order for the examples to be working.
+If you have a `polkadot` binary already, running this should be sufficient:
+
+```
+polkadot --dev
+```
+
+Then, in another terminal, run the app locally with:
+
+```
+trunk serve --open
+```
+
+# signing example
+
+For the signing example, we use the `@polkadot/extension-dapp` NPM package to talk to wallets loaded as browser extensions. In order to sign and submit the transaction using the `polkadot --dev` node we spawned above, you'll need to create a dev account in your wallet of choice. Use the recovery phrase `bottom drive obey lake curtain smoke basket hold race lonely fit walk` and the derivation path `//Alice` to create a dev account that can be used.