Add documentation explaining symlinks being removed after installing a new package

### Feature request Currently, my link.config.json file has one symlink set up. Running `npx link` creates the symlink, as expected. However, if I run `npm install <package>`, the symlink gets deleted and I have to run `npx link` again to recreate it. I don't know if this is the intended behavior or not. If it's not intended then you can consider this issue a bug report. But if it is intended then I think it should be mentioned in the README. ### Motivations I don't think I'm the only one who will ever encounter this. ### Alternatives _No response_ ### Additional context _No response_ ### Contributions - [ ] I plan to open a pull request for this issue - [ ] I plan to make a financial contribution to this project