Add webpack readme

tools/rollup-plugin/README.md

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+# @backtrace-labs/rollup-plugin
+If you're using rollup as your project bundler, you can use `@backtrace-labs/rollup-plugin` to automate working with sourcemaps.
+
+[(Source Map feature documentation)](https://docs.saucelabs.com/error-reporting/platform-integrations/source-map/)
+
+## Enable Source Maps for Your Application
+
+Set `sourcemap` in `output` to `true` in your `rollup.config.js`:
+
+```js
+module.exports = {
+  build: {
+    sourcemap: true
+  }
+}
+```
+
+If you're using code transpiler plugins (such as Typescript), ensure to enable source-mapping there as well.
+
+## Set up `@backtrace-labs/rollup-plugin`
+
+### Construct an upload URL
+
+A specific URL is required to upload source maps. Follow [these instructions](https://docs.saucelabs.com/error-reporting/project-setup/submission-url/) to create an upload URL for the `sourcemap` endpoint with a `symbol-post` token.
+
+### Install `@backtrace-labs/rollup-plugin` as a developer dependency:
+
+```bash
+> npm install --save-dev @backtrace-labs/rollup-plugin
+```
+
+### Add it to your `plugins` array in `rollup.config.js`:
+
+```js
+import { BacktracePlugin } from '@backtrace-labs/rollup-plugin';
+// or
+const { BacktracePlugin } = require('@backtrace-labs/rollup-plugin');
+
+module.exports = {
+  // other configuration
+  plugins: [new BacktracePlugin({
+    // enable upload only on production builds
+    uploadUrl: process.env.NODE_ENV === "production" ? "<your upload URL>" : undefined
+  })]
+}
+```

tools/vite-plugin/README.md

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+# @backtrace-labs/vite-plugin
+If you're using Vite as your project bundler, you can use `@backtrace-labs/vite-plugin` to automate working with sourcemaps.
+
+[(Source Map feature documentation)](https://docs.saucelabs.com/error-reporting/platform-integrations/source-map/)
+
+## Enable Source Maps for Your Application
+
+Set `sourcemap` in `output` to `true` in your `vite.config.js`:
+
+```js
+module.exports = {
+  build: {
+    sourcemap: true
+  }
+}
+```
+
+If you're using code transpiler plugins (such as Typescript), ensure to enable source-mapping there as well.
+
+## Set up `@backtrace-labs/vite-plugin`
+
+### Construct an upload URL
+
+A specific URL is required to upload source maps. Follow [these instructions](https://docs.saucelabs.com/error-reporting/project-setup/submission-url/) to create an upload URL for the `sourcemap` endpoint with a `symbol-post` token.
+
+### Install `@backtrace-labs/vite-plugin` as a developer dependency:
+
+```bash
+> npm install --save-dev @backtrace-labs/vite-plugin
+```
+
+### Add it to your `plugins` array in `vite.config.js`:
+
+```js
+import { BacktracePlugin } from '@backtrace-labs/vite-plugin';
+// or
+const { BacktracePlugin } = require('@backtrace-labs/vite-plugin');
+
+module.exports = {
+  // other configuration
+  plugins: [new BacktracePlugin({
+    // enable upload only on production builds
+    uploadUrl: process.env.NODE_ENV === "production" ? "<your upload URL>" : undefined
+  })]
+}
+```

tools/webpack-plugin/README.md

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+# @backtrace-labs/webpack-plugin
+If you're using Webpack as your project bundler, you can use `@backtrace-labs/webpack-plugin` to automate working with sourcemaps.
+
+[(Source Map feature documentation)](https://docs.saucelabs.com/error-reporting/platform-integrations/source-map/)
+
+## Enable Source Maps for Your Application
+
+Set `devtool` to `source-map` in your `webpack.config.js`:
+
+```js
+module.exports = {
+  devtool: 'source-map',
+  // other configuration
+}
+```
+
+If you're using code transpiler plugins (such as Typescript), ensure to enable `source-mapping` there as well.
+
+## Set up `@backtrace-labs/webpack-plugin`
+
+### Construct an upload URL
+
+A specific URL is required to upload source maps. Follow [these instructions](https://docs.saucelabs.com/error-reporting/project-setup/submission-url/) to create an upload URL for the `sourcemap` endpoint with a `symbol-post` token.
+
+### Install `@backtrace-labs/webpack-plugin` as a developer dependency:
+
+```bash
+> npm install --save-dev @backtrace-labs/webpack-plugin
+```
+
+### Add it to your `plugins` array in `webpack.config.js`:
+
+```js
+import { BacktracePlugin } from '@backtrace-labs/webpack-plugin';
+// or
+const { BacktracePlugin } = require('@backtrace-labs/webpack-plugin');
+
+module.exports = {
+  // other configuration
+  plugins: [new BacktracePlugin({
+    // enable upload only on production builds
+    uploadUrl: process.env.NODE_ENV === "production" ? "<your upload URL>" : undefined
+  })]
+}
+```