Rework contributing guide to reflect the new nature of the project

CONTRIBUTING.md

@@ -1,13 +1,21 @@
 # `zombiezen.com/go/sqlite` Contributor's Guide
 
-`zombiezen.com/go/sqlite` is mostly a project to fill my own needs, but is
-open source in the interest of availability and reuse. I am open to accepting
-bug fixes, but generally not larger changes or features. If in doubt, ask me.
+`zombiezen.com/go/sqlite` is [@zombiezen's][zombiezen] labor of love
+in providing a pleasant, performant, and powerful Go binding to SQLite.
+The design philosophy of `zombiezen.com/go/sqlite`
+is to be a direct binding to SQLite as much as possible
+while adapting the API to use Go idioms.
 
-File a bug on the [issue tracker][] or [open a pull request][]. Please follow
-the [Code of Conduct][] for all interactions. If applicable, add unit tests for
-your change before sending out for review.
+@zombiezen is open to accepting bug fixes,
+but generally not larger changes or features.
+If in doubt, ask them.
+And remember, [a "no" is temporary, a "yes" is forever.](https://opensource.guide/best-practices/)
+
+File a bug on the [issue tracker][] or [open a pull request][].
+Please follow the [Code of Conduct][] for all interactions.
+If applicable, add unit tests for your change before sending out for review.
 
 [Code of Conduct]: CODE_OF_CONDUCT.md
 [issue tracker]: https://github.com/zombiezen/go-sqlite/issues/new
 [open a pull request]: https://github.com/zombiezen/go-sqlite/compare
+[zombiezen]: https://github.com/zombiezen