add initial info about interactions with other plugins

Author: Conduitry

OTHER_PLUGINS.md

@@ -0,0 +1,23 @@
+# Interactions with other plugins
+
+## `eslint-plugin-html`
+
+Don't enable this at all on the files you're running `eslint-plugin-svelte3` on. Everything will almost certainly break.
+
+## `eslint-plugin-prettier`
+
+Don't enable this either on Svelte components. If you want to use Prettier, just use it directly, along with appropriate plugins.
+
+## `eslint-plugin-import`
+
+These rules are known to not work correctly together with this plugin:
+
+- `import/first`
+- `import/no-duplicates`
+- `import/no-mutable-exports`
+
+If you're using them on other linted files, consider adding `overrides` for them for Svelte components.
+
+## Others?
+
+If you've found another mainstream ESLint plugin that doesn't play nicely with this one, or has certain rules that don't work properly, please let us know!

README.md

@@ -46,7 +46,9 @@ For example:
 
 This plugin needs to be able to `require('svelte/compiler')`. If ESLint, this plugin, and Svelte are all installed locally in your project, this should not be a problem.
 
-**Important!** Make sure you do not have `eslint-plugin-html` enabled on the files you want linted as Svelte components, as the two plugins won't get along.
+## Interactions with other plugins
+
+Care needs to be taken when using this plugin alongside others. Take a look at [this list of things you need to watch out for](OTHER_PLUGINS.md).
 
 ## Configuration