Added linting (eslint and stylelint)

.eslintignore

@@ -0,0 +1,4 @@
+/node_modules/
+/build/
+/.svelte-kit/
+/vite.config.ts.timestamp-*.mjs

.eslintrc.cjs

@@ -0,0 +1,51 @@
+module.exports = {
+  extends: [
+    "eslint:recommended",
+    "prettier",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:svelte/prettier",
+  ],
+
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    project: "tsconfig.json",
+    extraFileExtensions: [".svelte"],
+  },
+  overrides: [
+    {
+      files: ["*.svelte"],
+      plugins: ["svelte"],
+      parser: "svelte-eslint-parser",
+      parserOptions: {
+        parser: {
+          ts: "@typescript-eslint/parser",
+          js: "espree",
+        },
+      },
+    },
+    {
+      files: ["*.js"],
+      parser: "espree",
+    }
+  ],
+
+  env: {
+    browser: true,
+    node: true,
+    es2020: true,
+  },
+
+  settings: {
+    svelte: {
+      kit: {
+        paths: {
+          base: process.env.BASE_PATH,
+        },
+      },
+    },
+  },
+
+  globals: {
+    NodeJS: true
+  },
+};

.github/workflows/linting.yml

@@ -0,0 +1,21 @@
+name: Linting
+
+on:
+  push:
+    branches: "master"
+  pull_request:
+
+jobs:
+  linting:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+          cache: npm
+      - run: npm ci
+      - name: eslint
+        run: npm run eslint
+      - name: stylelint
+        run: npm run stylelint

.gitignore

@@ -1,5 +1,4 @@
 /node_modules/
 /build/
 /.svelte-kit/
-/package/
 /vite.config.ts.timestamp-*.mjs

.prettierignore

@@ -1,5 +1,4 @@
 /node_modules/
 /build/
 /.svelte-kit/
-/package/
 /vite.config.ts.timestamp-*.mjs

.stylelintignore

@@ -0,0 +1,3 @@
+/node_modules/
+/build/
+/.svelte-kit/

.stylelintrc.yml

@@ -0,0 +1,14 @@
+extends:
+    - stylelint-config-standard-scss
+    - stylelint-config-prettier-scss
+    - stylelint-config-html/html
+    - stylelint-config-html/svelte
+plugins:
+  stylelint-use-nesting
+rules:
+  custom-property-empty-line-before: never
+  selector-pseudo-class-no-unknown:
+    - true
+    - ignorePseudoClasses:
+      - global
+  csstools/use-nesting: always