Define the CI workflow that runs precommit (#16)

CONTRIBUTING.md

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+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
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+**Table of Contents**  *generated with [DocToc](https://github.com/thlorenz/doctoc)*
+
+- [Contributing to Skyvern](#contributing-to-skyvern)
+  - [Table of Contents](#table-of-contents)
+  - [Code of Conduct](#code-of-conduct)
+  - [I Have a Question](#i-have-a-question)
+  - [I Want To Contribute](#i-want-to-contribute)
+    - [Reporting Bugs](#reporting-bugs)
+      - [Before Submitting a Bug Report](#before-submitting-a-bug-report)
+      - [How Do I Submit a Good Bug Report?](#how-do-i-submit-a-good-bug-report)
+    - [Suggesting Enhancements](#suggesting-enhancements)
+      - [Before Submitting an Enhancement](#before-submitting-an-enhancement)
+      - [How Do I Submit a Good Enhancement Suggestion?](#how-do-i-submit-a-good-enhancement-suggestion)
+    - [Your First Code Contribution](#your-first-code-contribution)
+    - [Improving The Documentation](#improving-the-documentation)
+  - [Styleguides](#styleguides)
+    - [Commit Messages](#commit-messages)
+  - [Join The Project Team](#join-the-project-team)
+  - [Attribution](#attribution)
+
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 # Contributing to Skyvern