Currently automatically setting the node version (by setting the
`KEYMAN_USE_NVM` env variable) is kind of broken on Linux because it
still requires to put `~/.keyman/node` on the PATH. This basically
limits us to the node version Keyman needs.
This change checks the path variable and adds `~/.keyman/node` if
necessary. This allows to not have that on the path, thus allowing to
use different node versions outside of Keyman, but still allows Keyman
to build with the node version it needs.
Test-bot: skip
sentry-manager is used by Keyman Engine for Android and Keyman Engine
for iOS, but not directly by KeymanWeb, nor does it have any
dependencies on /web. So it does not make sense to keep it under /web.
es-bundling is used by sentry-manager and potentially other /common/web
tools in the future, so moving it under /common/tools makes it more
consistent in the future.
This is part of simplifying the web source tree; these changes do not
make significant build performance differences at this time.
Test-bot: skip
Consolidates the node-related script functions into node.inc.sh, as part
of cleaning up the build scripts and making them easier to maintain into
the future.
Fixes: #14447
