chore: remove @parity/truapi-host package and its codegen pipeline (#236)

Drop the @parity/truapi-host TypeScript package along with the codegen
path that generated it: the `--host-output` flag and `generate_host`
emitter in truapi-codegen, the host build/format steps in
scripts/codegen.sh, and the host artifact upload in CI.

The truapi-codegen TypeScript emitter now only produces the
@parity/truapi client surface, so the host-only name-resolution modes
collapse to the single Public mode.

Author: pgherveou

.changeset/rename-provider-to-wireprovider.md

@@ -1,8 +1,5 @@
 ---
 "@parity/truapi": minor
-"@parity/truapi-host": patch
 ---
 
-Rename the exported `Provider` transport type to `WireProvider` to make its role explicit — it is the low-level SCALE-wire-frame pipe (a `MessagePort` or iframe `postMessage` channel) that `createTransport` runs on. The `createIframeProvider` / `createMessagePortProvider` factories are unchanged; only the type name moves. Consumers importing `Provider` should import `WireProvider` instead.
-
-`@parity/truapi-host` follows: its `createHostServer` / `createTrUApiServer` signatures and the codegen emitter now reference `WireProvider`.
+Rename the exported `Provider` transport type to `WireProvider` to make its role explicit. It is the low-level SCALE-wire-frame pipe (a `MessagePort` or iframe `postMessage` channel) that `createTransport` runs on. The `createIframeProvider` / `createMessagePortProvider` factories are unchanged; only the type name moves. Consumers importing `Provider` should import `WireProvider` instead.

.github/workflows/ci.yml

@@ -100,7 +100,6 @@ jobs:
             js/packages/truapi/src/playground/codegen
             js/packages/truapi/src/explorer/codegen
             js/packages/truapi/src/explorer/versions.ts
-            js/packages/truapi-host/src/generated
             playground/test/generated
 
   ts-client: