Add support for encoded local pids in external terms

[pguyot]

Fixes #1350

These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).

SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later

[bettio]

As an additional comment to this PR I was thinking that it might be a good idea to keep part of the distributed erlang code optional, so we can save some flash space on devices that have no network connection or no other companion chips.
Of course we should make sure that de-serializing an external pid on those devices will not crash the VM.

[pguyot]

As an additional comment to this PR I was thinking that it might be a good idea to keep part of the distributed erlang code optional, so we can save some flash space on devices that have no network connection or no other companion chips. Of course we should make sure that de-serializing an external pid on those devices will not crash the VM.

Distribution could happen over serial. I suggest we focus on keeping the VM small separately, as there could be more effective ways than adding more ifdefs to the project.

[bettio]

As an additional comment to this PR I was thinking that it might be a good idea to keep part of the distributed erlang code optional, so we can save some flash space on devices that have no network connection or no other companion chips. Of course we should make sure that de-serializing an external pid on those devices will not crash the VM.

Distribution could happen over serial. I suggest we focus on keeping the VM small separately, as there could be more effective ways than adding more ifdefs to the project.

Seems a good point.