Support running custom targets locally when using Remote Run

[mirinae3145]

Hi,
I'm adding custom (platform) targets via AddCustomTarget() and encountered inconsistent behavior.

Issue

• When running pio remote run -t custom_target, they are locally filtered out because they don't belong to predefined categories such as clean or fs family.
• As a result, custom targets are silently ignored in the local execution (maybe they ran on remote).

Expected

Custom targets are

1. executed locally, or
2. on both machines.

Question

1. Is there a way to mark a custom target as “allowed for local execution”?
2. Can the filtering logic be bypassed or extended so that custom targets are passed through to local cmd_run?

I think forcing remote option (-r) is not the solution I'm looking for.
Thank you.