fix: Really correct the rest param regex

[webJose]

Fixes #182.

[Copilot]

Pull request overview

This PR fixes issue #182 by correcting the regex pattern for rest parameters to properly handle empty matches. The updated pattern changes from (?<rest>\/.*) to (?<rest>(?:\/.*|$)), allowing rest parameters to match either a path segment or an empty string at the end of the pattern.

Key Changes:

• Updated the rest parameter regex pattern to support empty matches using alternation with $ anchor
• Added comprehensive test cases to verify the fix handles edge cases, including empty rest parameters and paths with similar text

Reviewed changes

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

File	Description
src/lib/kernel/RouteHelper.svelte.ts	Updated rest parameter regex to allow empty matches by adding `
src/lib/kernel/RouteHelper.svelte.test.ts	Updated expected regex patterns and added new test cases for empty rest parameters and similar path text scenarios

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