* test: add bats suite for the bash port + fix underscore-key guard (phase 5)
Part of #26. Closes#30.
The bash port reimplements the exclude lists, config accessors and argument
parsing, so it can drift from PowerShell independently. 50 bats tests mirror
the Pester suites assertion-for-assertion where the two are meant to agree:
z_archive_excludes (per-kind lists and the deploy-vs-backup gating), config
accessors, z_path Windows->WSL translation, json_build_label, and argument
handling (bare invocation, unknown key, 'all' expansion, --port override).
Fixes#30 along the way, because the alternative was a test enshrining the bug:
zproj_require accepted underscore comment keys. It only checked the key was
non-null, and a comment is a non-null JSON string, so 'zkill _note' sailed
through and exited 0 having done nothing - the silent-success failure mode.
Now rejects any _-prefixed key and requires the value to be a JSON object.
Both checks earn their place: the type check catches string comments, the
prefix rule catches an object-valued _template key that PowerShell refuses and
the type check alone would allow.
Documents #31 rather than fixing it: a leading dash on a project key works in
every PowerShell script but only in bash/zdeploy - the others reject -myapp as
an unknown option. Stripping it everywhere would make a mistyped flag resolve
as a project key, so the tests pin current behaviour and bash/README.md now
states the difference instead of the README's blanket claim.
Verified by mutation testing: all 9 mutations turn the suite red - removing the
python and vite backup gates, reintroducing #23 in bash, unfiltering underscore
keys in zproj_keys and zproj_require, breaking zremote_compose_dir fallback and
z_path translation, and removing zkill's all-expansion and no-args guard. Both
mutated files confirmed restored byte-for-byte.
An early run also caught a bug in the tests themselves: the membership helper
used 'grep -qx' (regex), so the needle '.env' matched 'venv' and several
'excludes .env' assertions were false passes. Now uses -qxF.
* fix(gitattributes): keep .bats files LF so 'bats tests/bash' works on a Windows checkout
The LF rule was scoped to 'bash/**', which does not match tests/bash/. With
core.autocrlf a Windows working copy got CRLF .bats files, and bats fails on
them - so the command the README documents would not run on the machine the
suite was written on without stripping \r first.
Adds tests/bash/** and *.bats to the same eol=lf rule and renormalises.
Verified by running 'bats tests/bash' with no sed preprocessing: 50/50.
