refactor: Modernise XBlock code

.github/workflows/ci-javascript.yml

@@ -0,0 +1,17 @@
+name: JavaScript CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches:
+    - '**'
+
+steps:
+- uses: actions/checkout@v4
+- name: Use Node.js
+  uses: actions/setup-node@v4
+  with:
+    node-version: 20.x
+- run: npm ci
+- run: npm run lint

.github/workflows/ci-python.yml

@@ -0,0 +1,30 @@
+name: Python CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches:
+    - '**'
+
+
+jobs:
+  run_tests:
+    name: linting
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: setup python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.8
+
+    - name: Install Dependencies
+      run: pip install .[]
+
+    - name: Run linting
+      run: pytest pdf

.gitignore

@@ -2,3 +2,4 @@
 .envrc
 .direnv/
 node_modules/
+xblock_pdf.egg-info/

.nvmrc

@@ -0,0 +1 @@
+20

eslint.config.mjs

@@ -0,0 +1,15 @@
+import globals from "globals";
+import pluginJs from "@eslint/js";
+
+
+export default [
+    {
+        ignores: ['!pdf/static/js/**'],
+    },
+    {
+        files: ["pdf/static/js/*.js"],
+
+        languageOptions: {sourceType: "script",globals: {...globals.browser, ...globals.jquery}}
+    },
+    pluginJs.configs.recommended,
+];