docs: add CONTRIBUTORS file listing all project contributors

Author: stefanoamorelli

CONTRIBUTORS

@@ -0,0 +1,21 @@
+SEC Edgar MCP Contributors
+==========================
+
+The following people have contributed to this project:
+
+Stefano Amorelli <stefano@amorelli.tech>
+Scott Goley <scottmgoley@gmail.com>
+JC (Jonathan Chen) <jc@dijonkitchen.org>
+Harin Lee <harinlee83@gmail.com>
+GERWARIC <gerwaric@gmail.com>
+
+How to Contribute
+-----------------
+We welcome contributions! Please see our contributing guidelines for more 
+information on how to get involved with the project.
+
+Acknowledgments
+---------------
+Special thanks to all contributors who have helped improve this project 
+through code contributions, bug reports, feature requests, and documentation 
+improvements.