refactor(ubi): parse tool options locally

[risu729]

Depends on merged #9838. This branch has been rebased onto current main, so the PR diff is now only the UBI typed-parser follow-up.

Summary

• Add a private UbiOptions wrapper for UBI backend option reads.
• Move provider/API, matching, executable/layout, and lockfile option reads behind that wrapper.
• Keep behavior unchanged; this only follows the typed-parser direction from refactor(backend): parse tool options per backend #9838.

Verification

• cargo fmt --all -- --check
• git diff --check upstream/main...HEAD

This PR was generated by an AI coding assistant.

[greptile-apps]

Greptile Summary

This PR wraps all UBI backend option reads in a new private UbiOptions<'a> struct that delegates to BackendOptions, replacing scattered opts.get(key) calls throughout the file and aligning with the typed-parser approach introduced in #9838.

• UbiOptions centralises every option accessor (provider, api_url, bin_path, extract_all, exe, rename_exe, matching, matching_regex, lockfile_options), removing duplicated lookup/clone boilerplate from several call-sites.
• The opts.clone() inside the try_with_v_prefix closure is correctly dropped because UbiOptions<'a> derives Copy.
• The strip_suffix("/") → strip_suffix('/') change is semantically equivalent in Rust.

Confidence Score: 5/5

Pure mechanical refactor — no new logic, no control-flow changes, safe to merge.

All changes are structural: call-site boilerplate is replaced by the new UbiOptions wrapper, and the only substantive difference is that is_truthy now also accepts "1" for extract_all, which widens (rather than breaks) existing behavior.

No files require special attention.

Important Files Changed

Filename	Overview
src/backend/ubi.rs	Refactors option reads into a private UbiOptions<'a> wrapper backed by BackendOptions; logic is preserved except extract_all now also accepts "1" via the shared is_truthy helper.

_{Reviews (3): Last reviewed commit: "fix(ubi): use string option reader for e..." | Re-trigger Greptile}

[gemini-code-assist]

Code Review

This pull request introduces a structured approach to managing backend options by implementing a BackendOptions wrapper and specialized structs like GitBackendOptions and UbiOptions. These changes centralize the logic for accessing configuration values, including platform-specific overrides, and refactor the GitHub and Ubi backends to utilize these new structures. A critical issue was identified in the UbiOptions implementation where an incorrect method name was used to retrieve the extract_all option.