docs: add descriptions to plugin README.tmpl.md files

packages/jest/README.tmpl.md

@@ -1,3 +1,5 @@
 # @swc/plugin-jest
 
+`@swc/plugin-jest` is a drop-in replacement for `babel-jest` that uses SWC to transform your code, enabling significantly faster Jest-based testing. It integrates with Jest's transformation pipeline so you can run your test suite with minimal configuration changes.
+
 ${CHANGELOG}

packages/loadable-components/README.tmpl.md

@@ -1,5 +1,7 @@
 # loadable-components
 
+`@swc/plugin-loadable-components` transforms `@loadable/component` dynamic imports to support server-side rendering (SSR) and code splitting. It is the SWC equivalent of the `@loadable/babel-plugin` and enables the full `@loadable/component` SSR workflow when using SWC as your compiler.
+
 ## Config
 
 ```json

packages/noop/README.tmpl.md

@@ -1,3 +1,5 @@
 # @swc/plugin-noop
 
+`@swc/plugin-noop` is a no-operation SWC plugin that passes code through without any transformation. It is useful for testing the SWC plugin system, benchmarking plugin infrastructure overhead, and as a template for building new plugins.
+
 ${CHANGELOG}

packages/react-remove-properties/README.tmpl.md

@@ -1,6 +1,6 @@
 # react-remove-properties
 
-See https://nextjs.org/docs/architecture/nextjs-compiler#remove-react-properties for more information.
+`@swc/plugin-react-remove-properties` removes React component properties (such as `data-testid`) from your production builds. This is useful for stripping test-only attributes that you don't want shipped to end users. See https://nextjs.org/docs/architecture/nextjs-compiler#remove-react-properties for more information.
 
 ## Config
 

packages/relay/README.tmpl.md

@@ -1,5 +1,7 @@
 ### `@swc/plugin-relay`
 
+`@swc/plugin-relay` compiles Relay GraphQL `graphql` tagged template literals into the corresponding Relay-generated artifact imports. It is the SWC equivalent of `babel-plugin-relay`, enabling projects that use the Relay framework to leverage SWC for faster compilation.
+
 #### Setup
 
 ```sh

packages/remove-console/README.tmpl.md

@@ -1,6 +1,6 @@
 # remove-console
 
-See https://nextjs.org/docs/architecture/nextjs-compiler#remove-console for more information.
+`@swc/plugin-remove-console` strips `console.*` calls from your production builds, helping to reduce bundle size and avoid leaking debug information to end users. You can optionally exclude specific console methods (e.g. `console.error`) from removal. See https://nextjs.org/docs/architecture/nextjs-compiler#remove-console for more information.
 
 ## Config
 

packages/styled-components/README.tmpl.md

@@ -1,5 +1,7 @@
 ### `@swc/plugin-styled-components`
 
+`@swc/plugin-styled-components` is the SWC equivalent of `babel-plugin-styled-components`. It adds display names to styled-components for better debugging, generates deterministic class names for server-side rendering (SSR), and enables other optimizations provided by the styled-components Babel plugin.
+
 #### Setup
 
 ```sh

packages/styled-jsx/README.tmpl.md

@@ -1,3 +1,5 @@
 # @swc/plugin-styled-jsx
 
+`@swc/plugin-styled-jsx` transforms `<style jsx>` tags in JSX components into scoped CSS, providing component-level style isolation. It is the SWC equivalent of the `styled-jsx` Babel plugin used by Next.js.
+
 ${CHANGELOG}

packages/swc-confidential/README.tmpl.md

@@ -1,5 +1,7 @@
 # @swc/plugin-swc-confidential
 
+`@swc/plugin-swc-confidential` encrypts string literals marked with the `/*#__CONFIDENTIAL__*/` comment using AES encryption at build time. This lets you ship sensitive strings (such as feature flag names or identifiers) in an obfuscated form so they are not trivially readable in your production bundle.
+
 ## Usage
 
 .swcrc:

packages/swc-magic/README.tmpl.md

@@ -1,5 +1,7 @@
 # @swc/plugin-swc-magic
 
+`@swc/plugin-swc-magic` processes magic annotations from the `@swc/magic` package, such as `markAsPure`, which annotates expressions so the SWC minifier can eliminate them as dead code during tree-shaking.
+
 ## Usage
 
 .swcrc:

packages/swc-sdk/README.tmpl.md

@@ -1,5 +1,7 @@
 # @swc/plugin-swc-sdk
 
+`@swc/plugin-swc-sdk` provides build-time transformations from the `@swc/sdk` package. It supports converting static imports annotated with `/*#__DYNAMIC__*/` into dynamic imports, and processes `markAsPure` annotations so the SWC minifier can tree-shake the marked expressions.
+
 # Usage
 
 .swcrc:

packages/transform-imports/README.tmpl.md

@@ -1,5 +1,7 @@
 # transform-imports
 
+`@swc/plugin-transform-imports` rewrites named imports into direct, member-level imports to reduce bundle size. For example, `import { Button } from 'react-bootstrap'` becomes `import Button from 'react-bootstrap/lib/Button'`, which allows bundlers to include only the specific module rather than the entire library.
+
 ## Config
 
 ```json