ci: split doc-checks into eslint and prettier

Prerequisite of moving prettier to project root.

PR: #568

.github/workflows/eslint.yml

@@ -0,0 +1,23 @@
+name: ESLint
+
+on:
+  push:
+    paths:
+      - ".github/workflows/eslint.yml"
+      - "docs/**"
+  pull_request:
+    paths:
+      - ".github/workflows/eslint.yml"
+      - "docs/**"
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: bahmutov/npm-install@v1
+        with:
+          working-directory: docs
+      - name: ESLint
+        run: npm run lint
+        working-directory: docs

.github/workflows/prettier.yml

@@ -1,26 +1,16 @@
-name: Docs Checks
+name: Prettier
 
 on:
   push:
     paths:
-      - ".github/workflows/doc-checks.yml"
+      - ".github/workflows/prettier.yml"
       - "docs/**"
   pull_request:
     paths:
-      - ".github/workflows/doc-checks.yml"
+      - ".github/workflows/prettier.yml"
       - "docs/**"
 
 jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: bahmutov/npm-install@v1
-        with:
-          working-directory: docs
-      - name: ESLint
-        run: npm run lint
-        working-directory: docs
   prettier:
     runs-on: ubuntu-latest
     steps: