chore: scaffold rne-rewrite target branch (#1255)

Set up the base for all RNE rewrite PRs (see #1208).

- Remove apps/ and the legacy packages/react-native-executorch.
- Stand up the new core package by porting the rnet-poc lower-level API:
  cpp/core (tensor/model/dtype/install/utils), src/core, and the native
  bridge. MyLib -> rnexecutorch rename throughout. OpenCV and task
  extensions are deferred to the per-task block PRs.
- Native ExecuTorch third-party binaries are NOT committed; CI is
  TypeScript-only and does not compile native code. They are provisioned
  separately before an on-device build (see third-party/README.md);
  wiring the on-demand mechanism is a follow-up.
- CI: drop the apps/llm native build workflows and the stale error-code
  verification step; run CI on the rne-rewrite branch.
- GitHub meta: scope lint/typecheck/build to the core package and keep
  the resource-fetcher and webrtc packages on disk but excluded from CI
  until their surface is reworked.

Author: msluszniak

.cspell-wordlist.txt

@@ -132,6 +132,12 @@ detr
 metaprogramming
 ktlint
 lefthook
+dtype
+numel
+metas
+Metas
+ndim
+nbytes
 espeak
 KOMODO
 DUNGENESS

.github/dependabot.yml

@@ -4,7 +4,6 @@ updates:
     directories:
       - "/"
       - "/packages/*"
-      - "/apps/*"
       - "/docs"
     schedule:
       interval: "monthly"

.github/workflows/build-android-llm-example.yml

@@ -3,9 +3,11 @@ on:
   push:
     branches:
       - main
+      - rne-rewrite
   pull_request:
     branches:
       - main
+      - rne-rewrite
   merge_group:
     types:
       - checks_requested
@@ -24,15 +26,7 @@ jobs:
         run: yarn lint
 
       - name: Typecheck files
-        run: yarn workspaces foreach --all --topological-dev run prepare && yarn typecheck
-
-      - name: Verify error codes are up to date
-        run: |
-          yarn codegen:errors
-          git diff --exit-code -- \
-            packages/react-native-executorch/src/errors/ErrorCodes.ts \
-            packages/react-native-executorch/common/rnexecutorch/ErrorCodes.h \
-            || { echo "::error::Error codes are stale. Run 'yarn codegen:errors' and commit the result."; exit 1; }
+        run: yarn workspaces foreach --all --exclude react-native-executorch-bare-resource-fetcher --exclude react-native-executorch-expo-resource-fetcher --exclude react-native-executorch-webrtc --topological-dev run prepare && yarn typecheck
 
   build-library:
     runs-on: ubuntu-latest
@@ -44,4 +38,4 @@ jobs:
         uses: ./.github/actions/setup
 
       - name: Build all packages
-        run: yarn workspaces foreach --all --topological-dev run prepare
+        run: yarn workspaces foreach --all --exclude react-native-executorch-bare-resource-fetcher --exclude react-native-executorch-expo-resource-fetcher --exclude react-native-executorch-webrtc --topological-dev run prepare

.github/workflows/build-ios-llm-example.yml

@@ -88,16 +88,11 @@ lib/
 ios/generated
 android/generated
 apps/*/ios/
-!apps/bare_rn/ios/
 apps/*/android/
-!apps/bare_rn/android/
 
 # generated TypeDoc API reference (regenerated at build time)
 docs/docs/06-api-reference/
 
-# integration test model assets
-packages/react-native-executorch/common/rnexecutorch/tests/integration/assets/models/
-
 # custom
 *.tgz
 Makefile