Implement smart Enter handler for Elixir #39
Description
Add intelligent Enter key handling to automatically indent code, continue multi-line constructs, and provide context-aware line breaks.
Features:
- Auto-indentation after opening delimiters: (, [, {, <<, %{
- Smart line continuation for keyword lists, binary operators, pipe chains
- Context-aware behaviors between delimiters
- Split string literals with proper concatenation
- Respect .editorconfig indentation settings
IntelliJ Extension Points:
- com.intellij.lang.smartEnterProcessor (SmartEnterProcessor)
- com.intellij.codeInsight.editorActions.enterHandler (EnterHandlerDelegate)
See full implementation details in create-issues.sh