PCBC-859: Update build scripts and instructions for Windows

[avsej]

No description provided.

[avsej]

It depends on this change in core: couchbase/couchbase-cxx-client#550, and still has some weird link error on the last step. So I will put as a draft, but contribution is welcome.

[avsej]

@raycardillo with this patch the instructions seem to work, at least I managed to get it in my environment

> php -d extension=couchbase -i | rg couchbase
couchbase
couchbase => enabled
couchbase_extension_version => 4.2.0
couchbase_extension_revision => 5d98471f9651e2157a160443990d303a0eb1cbc3
couchbase_client_revision => 291ed3da17a0a0d68a599dd25306dbb8eb7febac
couchbase.log_level => no value => no value
couchbase.log_path => no value => no value
couchbase.log_php_log_err => 1 => 1
couchbase.log_stderr => 0 => 0
couchbase.max_persistent => -1 => -1
couchbase.persistent_timeout => -1 => -1

[Matt-Woz]

LGTM