docs: include new page for eslint plugin within ecosystem section (#275)

* docs: include new page for eslint plugin within ecosystem section

* docs(eslint-plugin): remove unnecessary backticks

* docs(eslint-plugin): include example screenshot within the repo

* docs(eslint-plugin): update bullet list elements

Author: Belco90

docs/ecosystem-eslint-plugin-testing-library.md

@@ -0,0 +1,23 @@
+---
+id: ecosystem-eslint-plugin-testing-library
+title: eslint-plugin-testing-library
+---
+
+[`eslint-plugin-testing-library`][gh] is an ESLint plugin for Testing Library
+that helps users to follow best practices and anticipate common mistakes when
+writing tests.
+
+![eslint-plugin-testing-library example showing an error](/img/eslint-plugin-screenshot.png)
+
+This plugin includes:
+
+- Several rules for linting Testing Library specific code.
+- Shareable config for recommended rules.
+- Shareable configs for specific rules by framework: Angular, React, Vue.
+- Some autofixable rules.
+
+Find more info about available rules and configs on GitHub.
+
+- [eslint-plugin-testing-library on GitHub][gh]
+
+[gh]: https://github.com/Belco90/eslint-plugin-testing-library

website/sidebars.json

@@ -100,7 +100,8 @@
       "ecosystem-jest-dom",
       "ecosystem-bs-jest-dom",
       "ecosystem-jest-native",
-      "ecosystem-react-select-event"
+      "ecosystem-react-select-event",
+      "ecosystem-eslint-plugin-testing-library"
     ],
     "Help": ["faq", "learning", "contributing"]
   },