Add default CI

.ecrc

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+{
+    "Exclude": [
+        ".git"
+    ]
+}

.editorconfig

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+# EditorConfig is awesome: https://EditorConfig.org
+
+[*]
+# Ensure consistent file encoding in UNIX style
+charset = utf-8
+end_of_line = lf

.github/workflows/check-generic.yaml

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+# Generic checks to ease collaboration:
+# - consistent file encoding in UNIX style
+# - whitespaces in all purposes files like markdown, yaml, etc
+name: Check Generic
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  editorconfig-checker:
+    name: Run editorconfig-checker
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install editorconfig-checker
+        run: pipx install "editorconfig-checker"
+      - name: Run editorconfig-checker
+        run: ec .
+
+  markdownlint:
+    name: Run markdownlint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Run markdownlint-cli2
+        uses: DavidAnson/markdownlint-cli2-action@v13
+
+  yamllint:
+    name: Run yamllint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Run yamllint
+        run: yamllint .

.markdownlint-cli2.yaml

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+# Disable some built-in rules
+config:
+  line-length: false
+  no-inline-html: false
+  first-line-h1: false
+  code-block-style: false  # conflicts with MkDocs Admontions: https://squidfunk.github.io/mkdocs-material/reference/admonitions/
+  code-fence-style:
+    style: backtick
+
+# Define glob expressions to use (only valid at root)
+globs:
+  - "**/*.md"

.yamllint

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+extends: default
+
+rules:
+  document-start: disable
+  indentation:
+    spaces: 2
+  line-length: disable
+  quoted-strings:
+    quote-type: double
+    required: only-when-needed
+    allow-quoted-quotes: true
+    check-keys: true
+  truthy:
+    check-keys: false