Replace Simple Machine with guide for creating a custom manufacturer

[budak7273]

Simple Machine is currently an item counter implementing custom grab logic with blueprint code.

• Not really a common use case
• Bad for performance (should do in C++ instead)
• Current example has crashing problems that are probably threading related
• Hologram is broken for it

A custom manufacturer tutorial might be longer but would cover more meaningful topics

[budak7273]

Hologram fixed in SML 3.4.0 but threading is still problematic: https://discord.com/channels/555424930502541343/562722670974599227/1004721363753382058

[budak7273]

More info on what is needed for a basic machine from Arch https://discord.com/channels/555424930502541343/1036634533077979146/1128723382595235850