LC0092: Add variable/parameter sub-target resolution with inheritance fallback

[MODUSCarstenScholling]

Implement additions to LC0092 for variable/parameter target handling.

Changes:

• Add new naming targets:
  • LocalVariable
  • GlobalVariable
  • VarParameter
• Update symbol dispatch:
  • Local variable symbols -> LocalVariable
  • Global variable symbols -> GlobalVariable
  • Non-var parameters -> Parameter
  • var parameters -> VarParameter
• Add inheritance fallback for new target area:
  • LocalVariable -> Variable
  • GlobalVariable -> Variable
  • Parameter -> LocalVariable -> Variable
  • VarParameter -> Parameter -> LocalVariable -> Variable
• Keep resolution priority:
  • nearest user override first
  • then nearest built-in default

Tests:

• own override wins for LocalVariable, GlobalVariable, Parameter, VarParameter
• nearest ancestor fallback when own override is missing
• full fallback to Variable when only Variable override exists

Includes and resolves #342