feat(parser): temp clone rslint parser/etc into repo

Temporarily check in the rslint to make some changes we need right away. We're not planning on forking the parser.

.github/workflows/ci.yml

@@ -76,3 +76,22 @@ jobs:
         with:
           command: test
           args: --workspace --verbose
+
+  coverage:
+    name: Test262 coverage
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+      - name: Cache
+        uses: Swatinem/rust-cache@v1
+      - name: Run Test262 suite
+        continue-on-error: true
+        run: cargo xtask coverage

.gitignore

@@ -4,11 +4,13 @@ Profile-*.json
 .vscode
 .idea
 # Release artifacts
-/target
+**/target
 # Ignore test files that contributors could create locally
 /test.*
 # Ignore lockfiles
 yarn.lock
 package-lock.json
 npm-shrinkwrap.json
 pnpm-lock.yaml
+**/node_modules
+**/dist

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "xtask/src/coverage/test262"]
+	path = xtask/src/coverage/test262
+	url = https://github.com/tc39/test262