GHA CI: add file health checking

.github/workflows/ci_file_health.yaml

@@ -0,0 +1,25 @@
+name: CI - File health
+
+on: [pull_request, push]
+
+permissions: {}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: ${{ github.head_ref != '' }}
+
+jobs:
+  ci:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install tools
+        uses: actions/setup-python@v5
+        with:
+          python-version: "*"
+
+      - name: Check files
+        uses: pre-commit/action@v3.0.1

.github/workflows/helper/pre-commit/.typos.toml

@@ -0,0 +1,18 @@
+# https://github.com/crate-ci/typos/blob/master/docs/reference.md
+# https://github.com/crate-ci/typos/blob/master/docs/design.md#identifiers-and-words
+
+# try adding to `identifiers` list first, if doesn't work then `words` list
+
+[default.extend-identifiers]
+additionals = "additionals"
+caf = "caf"
+curren = "curren"
+FO = "FO"
+ket = "ket"
+Q_INVOKABLE = "Q_INVOKABLE"
+switchs = "switchs"
+ths = "ths"
+
+[default.extend-words]
+BA = "BA"
+helo = "helo"

.pre-commit-config.yaml

@@ -0,0 +1,30 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks.git
+    rev: v4.5.0
+    hooks:
+    - id: fix-byte-order-marker
+      name: Check file encoding (UTF-8 without BOM)
+
+    - id: mixed-line-ending
+      name: Check line ending character (LF)
+      args: ["--fix=lf"]
+
+    - id: end-of-file-fixer
+      name: Check trailing newlines
+
+    - id: trailing-whitespace
+      name: Check trailing whitespaces
+
+  - repo: https://github.com/codespell-project/codespell.git
+    rev: v2.2.6
+    hooks:
+    - id: codespell
+      name: Check spelling (codespell)
+      args: ["--ignore-words-list", ""]
+
+  - repo: https://github.com/crate-ci/typos.git
+    rev: v1.16.18
+    hooks:
+    - id: typos
+      name: Check spelling (typos)
+      args: ["--config", ".github/workflows/helper/pre-commit/.typos.toml"]