feature: adding assets.Manager#Path

[paganotoni]

This adds the assets.Manager#Path method as a higher level accessor to assets path. If an error is found by it this returns the passed name.

[Copilot]

Pull Request Overview

This PR adds a new Path method to the assets Manager as a convenience wrapper around PathFor. The method returns the fingerprinted asset path on success, or falls back to the original name on error, making it easier to use in templates where error handling is cumbersome.

• Added Manager.Path() method that wraps PathFor() and returns the original name on errors
• Updated concurrent test loop to use modern Go range syntax (for i := range goroutines)
• Added comprehensive test coverage for the new Path method with success and error cases

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
assets/fingerprint.go	Implements the new Path method with error-swallowing behavior and adds clarifying comment to PathFor
assets/fingerprint_test.go	Adds test coverage for the new Path method and modernizes loop syntax in concurrent test

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