docs: improve

Co-authored-by: logica0419 <[email protected]>

Author: ldez

docs/src/docs/welcome/integrations.mdx

@@ -17,8 +17,10 @@ Install the [extension](https://marketplace.visualstudio.com/items?itemName=gola
 <details>
 <summary style={{color: '#737380'}}>Recommended settings</summary>
 
+- For those who installed golangci-lint manually
+
 ```json
-"go.lintTool": "golangci-lint-v2",
+"go.lintTool": "golangci-lint",
 "go.lintFlags": [
   "--fast-only"
 ],
@@ -32,6 +34,25 @@ Install the [extension](https://marketplace.visualstudio.com/items?itemName=gola
 ]
 ```
 
+- For those who want to install golangci-lint via extension
+  - Install `golangci-lint-v2` via the `Go: Install/Update Tools` command after setting these configs
+- This will enable golangci-lint v1 to co-exist with v2
+
+```json
+"go.lintTool": "golangci-lint-v2",
+"go.lintFlags": [
+  "--fast-only"
+],
+"go.formatTool": "custom",
+"go.alternateTools": {
+  "customFormatter": "golangci-lint-v2"
+},
+"go.formatFlags": [
+  "fmt",
+  "--stdin"
+]
+```
+
 Using it in an editor without `--fast-only` can freeze your editor.
 Golangci-lint automatically discovers `.golangci.yml` config for edited file: you don't need to configure it in VS Code settings.