Add catch2 fallback

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For historic Meson versions, we need to add an explicit fallback tag to the catch2 dependency. Catch2 is available in the needed form since version 3.4.1, not 3.4.0.

[Copilot]

Pull Request Overview

This PR ensures compatibility with older Meson releases by requiring Catch2 ≥3.4.1 and adding an explicit fallback, and updates the Catch2 wrap to file-based distribution at version 3.8.1.

• Bump Catch2 dependency version to >=3.4.1 and add a fallback clause in tests/meson.build
• Convert catch2.wrap from git-based to file-based wrap for Catch2 v3.8.1 and adjust provided dependency names

Reviewed Changes

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

File	Description
tests/meson.build	Updated Catch2 dependency version and added fallback tag
subprojects/catch2.wrap	Swapped to [wrap-file] for Catch2 v3.8.1 and renamed provide entries

Comments suppressed due to low confidence (2)

subprojects/catch2.wrap:11

• The provided dependency name uses a hyphen (catch2-with-main) instead of the original underscore (catch2_with_main). Renaming it back to catch2_with_main maintains consistency with existing wraps and avoids breaking consumers.

catch2-with-main = catch2_with_main_dep

tests/meson.build:15

• [nitpick] Consider adding a brief comment explaining why the fallback is needed for historic Meson versions to improve maintainability and onboarding.

dependency('catch2', version : '>=3.4.1',

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Thanks, @Finii!