Correct GHS JEM directory

[dunk2k]

Amend titled directory to match it's physical counterpart

cc: @ramonimbao

Description

reference

• moved layouts LAYOUT_all and LAYOUT_iso to, sub-directory, /soldered
  • /hotwap_ansi doesn't support named layouts
• default keymap moved to /keymaps
  • default keymap for /soldered and /hotswap_ansi were identical
• layout names changed to match Community layouts
  • layout aliases added
• LAYOUT_all layout alias added to /hotswap_ansi to meet PR Checklist requirements regarding multi-layout boards

note: had to define community layouts per sub-dir (/soldered and /hotswap_ansi), as having community layout(s) in top-dir (/keyboards/ghs/jem) for some reason prevents community layout(s) in sub-dir from being included in CI builds.

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout (addition or update)
• Documentation

Issues Fixed or Closed by This PR

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).