ScriptPlayer+ v0.1.5-exp.7

Experimental Windows build for the packaged Direct Serial fix.

Changes:

• fixed packaged @serialport/bindings-cpp loading so JS dependencies resolve correctly in app.asar
• keeps the native serialport addon loading from the unpacked package
• bumps the experimental build version to 0.1.5-exp.7

Please retest issue #1 with this build.