Added tooling, worked on styles, xterm

.github/codeowners

@@ -0,0 +1 @@
+* @james-pre

.github/workflows/ci.yaml

@@ -0,0 +1,50 @@
+name: Continuous Integration
+
+on:
+    push:
+        branches:
+            - main
+    workflow_dispatch:
+    workflow_call:
+    pull_request:
+
+jobs:
+    ci:
+        name: CI
+        runs-on: ubuntu-latest
+        permissions:
+            contents: write
+            id-token: write
+            pages: write
+        environment:
+            name: github-pages
+            url: ${{ steps.deploy.outputs.page_url }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v4
+              with:
+                  node-version: 22
+
+            - name: Install dependencies
+              run: npm install
+
+            - name: Formatting
+              run: npm run format:check
+
+            - name: Linting
+              run: npm run lint
+
+            - name: Build
+              run: npm run build
+
+            - name: Upload artifact
+              uses: actions/upload-pages-artifact@v3
+              with:
+                  path: ./build
+
+            - name: Deploy
+              id: deploy
+              uses: actions/deploy-pages@v4

.gitignore

@@ -1,3 +1,4 @@
 node_modules
 tmp
-dist
+dist
+build

build.ts

@@ -0,0 +1,48 @@
+#!/usr/bin/env node
+import { build, context, type BuildOptions } from 'esbuild';
+import { parseArgs } from 'node:util';
+
+const {
+	values: { mode = 'build' },
+} = parseArgs({
+	options: {
+		mode: { short: 'm', type: 'string', default: 'build' },
+	},
+	strict: false,
+	allowPositionals: true,
+});
+
+const outdir = 'build';
+
+const config: BuildOptions = {
+	entryPoints: ['src/index.ts', 'src/index.html', 'src/styles.css'],
+	target: 'es2021',
+	outdir,
+	loader: {
+		'.html': 'copy',
+	},
+	sourcemap: true,
+	keepNames: true,
+	bundle: true,
+	format: 'esm',
+	platform: 'browser',
+};
+
+switch (mode) {
+	case 'watch': {
+		const ctx = await context(config);
+		console.log('Watching for changes...');
+		await ctx.watch();
+		break;
+	}
+	case 'dev': {
+		const ctx = await context(config);
+		await ctx.watch();
+		const { host, port } = await ctx.serve({ servedir: outdir });
+		console.log(`Development server started at http://${['127.0.0.1', '0.0.0.0'].includes(host) ? 'localhost' : host}:${port}`);
+		break;
+	}
+	case 'build':
+	default:
+		await build(config);
+}