feat(napi): add threadless WASI builds (#26898)

## Summary

- add threadless `wasm32-wasip1` builds and generated loaders for parser, minify, transform, transform-react, and transform-relay
- use the threadless bindings for browser and Cloudflare Workers while preserving threaded WASI and WebContainer fallbacks
- build and publish the new target in CI and release workflows

Closes #25271

## Testing

- native NAPI builds and package tests: 1,091 passed
- parser Chromium browser tests passed
- local workerd smoke tests passed for all five packages
- deployed Workers using local package tarballs passed for all five packages and reported `wasm32-wasip1`
- packed main-package file lists match the published `0.150.0` packages
- `just fmt`, `just check`, `just lint`, `just doc`, `just ast`, targeted Oxlint, typos, and `git diff --check` passed
- `just ready` reaches three unrelated Oxlint ANSI-color snapshot mismatches in this non-interactive environment; no pending snapshots remain

## AI assistance

Codex was used to help implement and test this change. The contributor remains responsible for reviewing and understanding the changes before merge.

Author: Boshen

.github/workflows/ci.yml

@@ -183,8 +183,10 @@ jobs:
       - name: Build
         if: steps.filter.outputs.changed == 'true'
         run: |
+          rustup target add wasm32-wasip1
           rustup target add wasm32-wasip1-threads
           pnpm run build-wasm-dev
+          pnpm run build-wasip1-dev
           git diff --exit-code # Must commit everything
       - name: Test wasi in browser
         if: steps.filter.outputs.changed == 'true'
@@ -194,6 +196,7 @@ jobs:
           pnpm exec playwright install chromium
           pnpm run build-wasi
           pnpm run build-wasm-dev
+          pnpm run build-wasip1-dev
           pnpm run build-npm-dir
           pnpm run test-browser
           pnpm build-browser-bundle --npmDir npm-dir

.github/workflows/reusable_release_napi.yml

@@ -80,6 +80,10 @@ jobs:
             target: wasm32-wasip1-threads
             build: pnpm build-wasm
 
+          - os: ubuntu-latest
+            target: wasm32-wasip1
+            build: pnpm build-wasip1
+
           - os: ubuntu-latest
             target: s390x-unknown-linux-gnu
             build: |

napi/minify/browser.js

@@ -1 +1 @@
-export * from '@oxc-minify/binding-wasm32-wasi'
+export * from '@oxc-minify/binding-wasm32-wasip1'

napi/minify/index.js

@@ -565,7 +565,7 @@ function createLoadErrorChain(errors) {
 //
 // NAPI_RS_WASI_FLAVOR selects one exact generated flavor and implies strict
 // WASI loading. It never crosses into another flavor or falls back to native.
-const __napiWasiFlavors = ['wasm32-wasi']
+const __napiWasiFlavors = ['wasm32-wasi', 'wasm32-wasip1']
 const __napiWasiFlavor = process.env.NAPI_RS_WASI_FLAVOR
 const __napiWasiFlavorRequested =
   typeof __napiWasiFlavor === 'string' && __napiWasiFlavor.length > 0
@@ -655,6 +655,27 @@ if (!nativeBinding || forceWasi) {
       loadErrors.push(candidateError)
     }
   }
+  if (!wasiBindingLoaded && (!__napiWasiFlavorRequested || __napiWasiFlavor === 'wasm32-wasip1')) {
+    let candidateError = null
+    let candidateFailed = false
+    try {
+      candidateError = __napiWasiResolveCandidate('./minify.wasip1.cjs', false, ['./minify.wasm32-wasip1.debug.wasm', './minify.wasm32-wasip1.wasm'])
+      candidateFailed = candidateError !== null
+      if (!candidateFailed) {
+        wasiBinding = require('./minify.wasip1.cjs')
+        nativeBinding = wasiBinding
+        __napiLoadedBindingTarget = 'wasm32-wasip1'
+        wasiBindingLoaded = true
+      }
+    } catch (err) {
+      candidateError = err
+      candidateFailed = true
+    }
+    if (candidateFailed) {
+      wasiBindingErrors.push(candidateError)
+      loadErrors.push(candidateError)
+    }
+  }
   if (!wasiBindingLoaded && (!__napiWasiFlavorRequested || __napiWasiFlavor === 'wasm32-wasi')) {
     let candidateError = null
     let candidateFailed = false
@@ -682,6 +703,33 @@ if (!nativeBinding || forceWasi) {
       loadErrors.push(candidateError)
     }
   }
+  if (!wasiBindingLoaded && (!__napiWasiFlavorRequested || __napiWasiFlavor === 'wasm32-wasip1')) {
+    let candidateError = null
+    let candidateFailed = false
+    try {
+      candidateError = __napiWasiResolveCandidate('@oxc-minify/binding-wasm32-wasip1', true, undefined)
+      candidateFailed = candidateError !== null
+      if (!candidateFailed) {
+        if (process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          const bindingPackageVersion = require('@oxc-minify/binding-wasm32-wasip1/package.json').version
+          if (bindingPackageVersion !== '0.151.0') {
+            throw new Error(`WASI binding package version mismatch, expected 0.151.0 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+        }
+        wasiBinding = require('@oxc-minify/binding-wasm32-wasip1')
+        nativeBinding = wasiBinding
+        __napiLoadedBindingTarget = 'wasm32-wasip1'
+        wasiBindingLoaded = true
+      }
+    } catch (err) {
+      candidateError = err
+      candidateFailed = true
+    }
+    if (candidateFailed) {
+      wasiBindingErrors.push(candidateError)
+      loadErrors.push(candidateError)
+    }
+  }
   if (
     !wasiBindingLoaded &&
     forceWasi &&