refactor: ablate redundant abstractions across packages

Remove duplicated and vestigial internal design surfaced by a full
ablation study, with no change to runtime behaviour and no change to any
shipped public entry point (only internal machinery and unpublished
source removed).

- plugins: drop 12 per-plugin re-creations of `defineRpcFunction`
  (each was `createDefineWrapperWithContext<DevframeNodeContext>()`,
  identical to the pre-bound export from `devframe`); import the core
  wrapper directly instead
- plugins: collapse single-consumer `connectAssets`/`connectOg`/
  `connectCodeServer`/`connectInspect` SPA pass-throughs to
  `connectDevframe` (connect modules stay as type barrels)
- plugins/git: delete unrendered `BranchesPanelView`/`DiffPanelView`
  (+ stories) and the now-unused `shiki` dev dep and `RpcContext` export
- plugins/terminals: drop dead `snapshot: true` (the plugin sets
  `capabilities.build: false`, so the snapshot dump never runs)
- devframe: drop the always-`false` `unwrapped` field from the internal
  `argsToJsonSchema`; inline `promiseWithResolver` to native
  `Promise.withResolvers`; move the test-only `AssertEqual` into its test;
  extract the byte-identical node/client settings-store body into a
  shared `createSettingsStore`
- hub: delete the dead `logs` script-context prop and two stale docblocks
- kits: remove a discarded `createResolver()` call, a self-merging
  `Object.assign`, and an unreachable `undefined` branch in nuxt; reuse
  devframe's `normalizeBasePath`/`resolveBasePath` in the next handler;
  delete json-render-ui's unbuilt (non-exported) barrel + `createRenderer`
  and prune the dead workspace aliases

Created with the help of an agent.

Author: antfubot

packages/hub/src/client/context.ts

@@ -17,3 +17,5 @@ export function getDevframeClientContext(): DevframeClientContext | undefined {
 export function setDevframeClientContext(ctx: DevframeClientContext | undefined): void {
   (globalThis as any)[CLIENT_CONTEXT_KEY] = ctx
 }
+
+export { CLIENT_CONTEXT_KEY }

tests/__snapshots__/tsnapi/@devframes/hub/client.snapshot.d.ts

@@ -267,6 +267,7 @@ export declare function watchFrameLocation(_: WatchFrameLocationOptions): () =>
 // #endregion
 
 // #region Variables
+export declare const CLIENT_CONTEXT_KEY: string;
 /** @deprecated */
 export declare const createDevframeClientHost: typeof createDevframeClientRuntime;
 export declare const FRAME_NAV_CHANNEL: string;

tests/__snapshots__/tsnapi/@devframes/hub/client.snapshot.js

@@ -17,6 +17,7 @@ export function watchFrameLocation(_) {}
 // #endregion
 
 // #region Variables
+export var CLIENT_CONTEXT_KEY /* const */
 /** @deprecated */
 export var createDevframeClientHost /* const */
 export var FRAME_NAV_CHANNEL /* const */