Set up Prettier for auto-formatting (#267)

Author: thibaudcolas

.editorconfig

@@ -10,5 +10,5 @@ insert_final_newline = true
 [*.md]
 trim_trailing_whitespace = false
 
-[*.{yaml,yml,json,md}]
+[*.{yaml,yml,json,json5,md,toml}]
 indent_size = 2

.git-blame-ignore-revs

@@ -0,0 +1,7 @@
+# git-blame ignored revisions
+# To configure, run
+#   git config blame.ignoreRevsFile .git-blame-ignore-revs
+# Requires Git > 2.23
+# See https://git-scm.com/docs/git-blame#Documentation/git-blame.txt---ignore-revs-fileltfilegt
+
+# Initial Prettier reformatting (#TBC)

.github/workflows/ci.yml

@@ -54,6 +54,7 @@ jobs:
         with:
           node-version-file: ".nvmrc"
       - run: npm ci --no-audit
+      - run: npm run lint || true
       - run: npm run build
       - run: pipx install "poetry>=2.1.2,<3"
       - uses: actions/setup-python@v5

.prettierrc.toml

@@ -0,0 +1,8 @@
+# See https://prettier.io/docs/options.html.
+# Prettier also reads .editorconfig.
+printWidth = 80
+singleQuote = true
+quoteProps = 'consistent'
+trailingComma = 'all'
+arrowParens = 'always'
+proseWrap = 'preserve'