ci: set up fork CI, agent file, and fix clippy for Rust 1.93

Author: RealiCZ

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,34 +1,7 @@
-<!--
-Thank you for your Pull Request. Please provide a description above and review
-the requirements below.
+## Summary
 
-Bug fixes and new features should include tests.
+<!-- What does this PR do and why? -->
 
-Contributors guide: https://github.com/foundry-rs/foundry/blob/master/CONTRIBUTING.md
+## Test plan
 
-The contributors guide includes instructions for running rustfmt and building the
-documentation.
--->
-
-<!-- ** Please select "Allow edits from maintainers" in the PR Options ** -->
-
-## Motivation
-
-<!--
-Explain the context and why you're making that change. What is the problem
-you're trying to solve? In some cases there is not a problem and this can be
-thought of as being the motivation for your change.
--->
-
-## Solution
-
-<!--
-Summarize the solution and provide any necessary context needed to understand
-the code change.
--->
-
-## PR Checklist
-
-- [ ] Added Tests
-- [ ] Added Documentation
-- [ ] Breaking changes
+<!-- How was this tested? -->