ci: add workflow_dispatch to key CI workflows + ignore test-results.json

Adds workflow_dispatch trigger to clippy-fmt, Workspace CI, regression-guard,
supply-chain, and WASM Dedup Check so they can be manually dispatched when
ubuntu-latest runners are unavailable (GitHub free plan runner exhaustion).
Also ignores generated npm/tests/test-results.json.

Co-Authored-By: claude-flow <ruv@ruv.net>

.github/workflows/ci.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches: [main]
   pull_request:
+  workflow_dispatch:
 
 env:
   CARGO_TERM_COLOR: always

.github/workflows/clippy-fmt.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches: [main]
   pull_request:
+  workflow_dispatch:
 
 env:
   CARGO_TERM_COLOR: always

.github/workflows/regression-guard.yml

@@ -9,6 +9,7 @@ on:
   push:
     branches: [main]
   pull_request:
+  workflow_dispatch:
 
 permissions:
   contents: read

.github/workflows/supply-chain.yml

@@ -35,6 +35,7 @@ on:
     # so the two crates don't pile onto the GH Actions scheduler at
     # the same minute.
     - cron: '23 9 * * 2'
+  workflow_dispatch:
 
 permissions:
   contents: read

.github/workflows/wasm-dedup-check.yml

@@ -4,6 +4,7 @@ on:
     branches: [main]
   pull_request:
     branches: [main]
+  workflow_dispatch:
 jobs:
   check-wasm-dedup:
     runs-on: ubuntu-latest

npm/.gitignore

@@ -34,6 +34,8 @@ Thumbs.db
 # Test coverage
 coverage/
 .nyc_output/
+test-results.json
+**/test-results.json
 
 # Temporary files
 tmp/