refactor(core): split web entry from core (#6082)

This pr is trying to split `web` and `electron` entries from `core`. It allows more platform-related optimization to be addressed in each entry.
We should remove all browser/electron only codes from `core` eventually, this is the very first step for that.

tools/cli/src/webpack/webpack.config.ts

@@ -0,0 +1,55 @@
+import { execSync } from 'node:child_process';
+import { join, resolve } from 'node:path';
+
+import type { BuildFlags } from '@affine/cli/config';
+import { Repository } from '@napi-rs/simple-git';
+import HTMLPlugin from 'html-webpack-plugin';
+import { once } from 'lodash-es';
+import { merge } from 'webpack-merge';
+
+import { createConfiguration, rootPath, workspaceRoot } from './config.js';
+import { getRuntimeConfig } from './runtime-config.js';
+
+const DESCRIPTION = `There can be more than Notion and Miro. AFFiNE is a next-gen knowledge base that brings planning, sorting and creating all together.`;
+
+const gitShortHash = once(() => {
+  const { GITHUB_SHA } = process.env;
+  if (GITHUB_SHA) {
+    return GITHUB_SHA.substring(0, 9);
+  }
+  const repo = new Repository(workspaceRoot);
+  const shortSha = repo.head().target()?.substring(0, 9);
+  if (shortSha) {
+    return shortSha;
+  }
+  const sha = execSync(`git rev-parse --short HEAD`, {
+    encoding: 'utf-8',
+  }).trim();
+  return sha;
+});
+
+export function createWebpackConfig(cwd: string, flags: BuildFlags) {
+  console.log('build flags', flags);
+  const runtimeConfig = getRuntimeConfig(flags);
+  console.log('runtime config', runtimeConfig);
+  const config = createConfiguration(cwd, flags, runtimeConfig);
+  return merge(config, {
+    entry: {
+      app: flags.entry ?? resolve(cwd, 'src/index.tsx'),
+    },
+    plugins: [
+      new HTMLPlugin({
+        template: join(rootPath, 'webpack', 'template.html'),
+        inject: 'body',
+        scriptLoading: 'module',
+        minify: false,
+        chunks: ['app'],
+        filename: 'index.html',
+        templateParameters: {
+          GIT_SHORT_SHA: gitShortHash(),
+          DESCRIPTION,
+        },
+      }),
+    ],
+  });
+}