Split IteratorInterfaceExtensions into separate extension

This change creates a separate extension for IteratorInterfaceExtensions.jl
functionality, providing more granular control over dependency loading.

Changes:
- Create RecursiveArrayToolsIteratorInterfaceExtensionsExt for isiterable()
- Keep getiterator() in TablesExt since it requires Tables.jl functionality
- Update Project.toml to include the new extension
- Avoid method conflicts by having isiterable only in the IIE extension

This allows users who only need the basic iterator interface to load
just IteratorInterfaceExtensions without pulling in the full Tables.jl
dependency chain.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ChrisRackauckas

Project.toml

@@ -37,6 +37,7 @@ RecursiveArrayToolsMonteCarloMeasurementsExt = "MonteCarloMeasurements"
 RecursiveArrayToolsReverseDiffExt = ["ReverseDiff", "Zygote"]
 RecursiveArrayToolsSparseArraysExt = ["SparseArrays"]
 RecursiveArrayToolsStructArraysExt = "StructArrays"
+RecursiveArrayToolsIteratorInterfaceExtensionsExt = "IteratorInterfaceExtensions"
 RecursiveArrayToolsTablesExt = ["Tables", "IteratorInterfaceExtensions"]
 RecursiveArrayToolsTrackerExt = "Tracker"
 RecursiveArrayToolsZygoteExt = "Zygote"

ext/RecursiveArrayToolsIteratorInterfaceExtensionsExt.jl

@@ -0,0 +1,14 @@
+module RecursiveArrayToolsIteratorInterfaceExtensionsExt
+
+import RecursiveArrayTools: AbstractDiffEqArray
+import IteratorInterfaceExtensions
+
+# Iterator interface for QueryVerse
+# (see also https://tables.juliadata.org/stable/#Tables.datavaluerows)
+IteratorInterfaceExtensions.isiterable(::AbstractDiffEqArray) = true
+
+# Note: getiterator functionality requires Tables.jl and will be available
+# when both Tables.jl and IteratorInterfaceExtensions.jl are loaded
+# via the TablesExt extension.
+
+end

ext/RecursiveArrayToolsTablesExt.jl

@@ -82,7 +82,7 @@ end
 
 # Iterator interface for QueryVerse
 # (see also https://tables.juliadata.org/stable/#Tables.datavaluerows)
-IteratorInterfaceExtensions.isiterable(::AbstractDiffEqArray) = true
+# Note: isiterable is defined in IteratorInterfaceExtensionsExt
 function IteratorInterfaceExtensions.getiterator(A::AbstractDiffEqArray)
     Tables.datavaluerows(Tables.rows(A))
 end