fix: error in project with folder that ends with .go

[not-matthias]

Fixes #22

[Copilot]

Pull Request Overview

This PR fixes an issue where the Go runner incorrectly processes directories ending with .go as if they were Go source files. The fix adds a check to skip directories when patching imports, preventing errors when projects contain folders with names like vendor/github.com/nats-io/nats.go or some_package.go.

• Added validation to skip directories in the glob pattern matching
• Added comprehensive test coverage with a new test project containing a .go folder
• Updated integration tests to verify the fix works correctly

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
go-runner/src/builder/patcher.rs	Added directory check to skip non-file paths in glob results
go-runner/src/integration_tests.rs	Added test case for the new example project
go-runner/testdata/projects/example-with-dot-go-folder/go.mod	Test project module definition
go-runner/testdata/projects/example-with-dot-go-folder/bench_test.go	Root-level benchmark test for the test project
go-runner/testdata/projects/example-with-dot-go-folder/some_package.go/bench_test.go	Benchmark test inside the .go folder to verify the fix
go-runner/src/snapshots/codspeed_go_runner__integration_tests__assert_results_snapshots@example-with-dot-go-folder.snap	Expected test output snapshot

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[codspeed-hq]

CodSpeed Performance Report

Merging #21 will degrade performances by 27.91%

_{Comparing cod-1499-error-running-action-for-go (a717729) with main (83d8105)}

Summary

❌ 1 regression
✅ 23 untouched

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	BenchmarkLargeSetupInLoop	31 ns	43 ns	-27.91%