Rename the plugin to teamtype

[ninanomenon]

The plugin is still called ethersync in the code and configs. At least the plugin should appear as teamtype in the IDE interface.

[zormit]

I'd take this one, as a "low hanging fruit" to familiarize myself with the codebase :)

As far as I can see the following "areas" are relevant:

• filesystem + code
  • package name io.github.ethersync => should be renamed to org.teamtype
  • class and interface names, e.g. EthersyncService (touches filename + code)
• rest of the code
• documentation
• within .github

[schrieveslaach]

@zormit, yeah sure. Let me know if I can assist. Meanwhile, I'll invest some time in testing.