docs: add TheDavidDelta as a contributor (#4)

* docs: update README.md [skip ci]

* docs: create .all-contributorsrc [skip ci]

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

README.md

@@ -1,2 +1,25 @@
 # lingva-translate
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
+
+## Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://thedaviddelta.com/"><img src="https://avatars.githubusercontent.com/u/6679900?v=4?s=100" width="100px;" alt=""/><br /><sub><b>David</b></sub></a><br /><a href="#a11y-TheDavidDelta" title="Accessibility">️️️️♿️</a> <a href="https://github.com/TheDavidDelta/lingva-translate/commits?author=TheDavidDelta" title="Code">💻</a> <a href="https://github.com/TheDavidDelta/lingva-translate/commits?author=TheDavidDelta" title="Documentation">📖</a> <a href="#design-TheDavidDelta" title="Design">🎨</a> <a href="https://github.com/TheDavidDelta/lingva-translate/commits?author=TheDavidDelta" title="Tests">⚠️</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!