#2309)

* fix: ensure that bundlers pick the browser version unless running in a node context

* docs: add @amxmln as a contributor

* fix: Acknowledgments section in README

* fix main logo in README

* fix branch reference

* feat: add refresh option to status and statusMatrix

`status` and `statusMatrix` currently rewrite `.git/index` when a
working-tree file's stat info has drifted but its content still
matches the staged blob (the racy-git stat cache refresh). For
callers that need read-only behavior with respect to the index,
this adds an opt-in `refresh: false` parameter that gates the
`index.insert` in both code paths. Existing callers default to
`refresh: true`, preserving today's behavior.

The option is threaded through `WORKDIR({ refresh })` and
`GitWalkerFs`, so any consumer of the walker API can opt out too.

* docs: add @toxik as a contributor

* test: cover refresh: false for status and statusMatrix

Verify that when callers opt in with `refresh: false`, the racy
stat-cache rewrite of `.git/index` is suppressed. The test bumps
the workdir mtime on a tracked file without changing contents
(so the racy refresh path would otherwise fire), snapshots
`.git/index`, runs the read-only query, and asserts the byte
contents are unchanged.

Mirrored in the -in-submodule.js variants per CONTRIBUTING
Appendix A.

* fix: add cloudflare logo

* fix typo

* fix: pass credential config username to auth callbacks

* test: include response URL in fetch auth mock

* test: mock empty HTTP response bodies