chore: add incremental spellcheck

.github/workflows/spelling-incremental.yml

@@ -0,0 +1,28 @@
+name: Spellcheck(Incremental)
+
+on:
+  pull_request:
+    branches: 
+      - '**'
+  workflow_dispatch:
+
+jobs:
+  spelling:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Get all changed markdown files
+        uses: tj-actions/changed-files@v45
+        id: changed_files
+        with:
+          files: |
+            **.md
+            
+      - name: Run Spellcheck
+        id: spellcheck
+        uses: rojopolis/spellcheck-github-actions@v0
+        with:
+          task_name: Markdown
+          source_files: ${{ steps.changed_files.outputs.all_changed_files }}
+          config_path: .spellcheck.yml

.spellcheck.yml

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+matrix:
+- name: Markdown
+  sources:
+    - '**/*.md' 
+  expect_match: false   # false -> supress errors if no markdown files were edited
+  aspell:
+    lang: en
+  dictionary:
+    wordlists:
+    - .wordlist.txt
+  encoding: utf-8
+  pipeline:
+    - pyspelling.filters.markdown
+    - pyspelling.filters.text
+  default_encoding: utf-8
+  suggest: true
+

.wordlist.txt

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+ALLOC
+IANA
+SHARDING
+WAKU
+Waku
+danielkaiser
+creativecommons
+github
+GITHUB
+https
+iana
+md
+rfc
+RFC
+www
+DHT
+DoS
+GossipSub
+gossipsub
+libp2p
+pubsub
+subnets
+ZXCV