Rewrite ragged sublibrary using complete v3 VectorOfArray code

Replace the partial reimplementation with the complete v3 vector_of_array.jl
code, mechanically transformed (VectorOfArray → RaggedVectorOfArray, etc.).

This preserves ALL v3 behavior exactly:
- A[i] returns the i-th inner array
- A[:, i] returns inner array without zero-padding
- RaggedEnd for per-column `end` resolution
- Iteration over inner arrays
- Full broadcasting, copy, zero, similar, fill!, push!, etc.

Tests are the complete v3 test suite (basic_indexing + interface_tests)
with same type renames, plus tests for interp/dense, conversion, and SII.

430 tests pass.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ChrisRackauckas

lib/RecursiveArrayToolsRaggedArrays/Project.toml

@@ -3,17 +3,26 @@ uuid = "c384ba91-639a-44ca-823a-e1d3691ab84a"
 version = "1.0.0"
 
 [deps]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
+ArrayInterface = "4fba245c-0d91-5ea0-9b3e-6abc04ee57a9"
+LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 RecursiveArrayTools = "731186ca-8d62-57ce-b412-fbd966d074cd"
+StaticArraysCore = "1e83bf80-4336-4d27-bf5d-d5a4f845583c"
 SymbolicIndexingInterface = "2efcf032-c050-4f8e-a9bb-153293bab1f5"
 
 [compat]
+Adapt = "4"
+ArrayInterface = "7"
+LinearAlgebra = "1.10"
 RecursiveArrayTools = "4"
+StaticArraysCore = "1.4"
 SymbolicIndexingInterface = "0.3.35"
 julia = "1.10"
 
 [extras]
+SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 SymbolicIndexingInterface = "2efcf032-c050-4f8e-a9bb-153293bab1f5"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["SymbolicIndexingInterface", "Test"]
+test = ["SparseArrays", "SymbolicIndexingInterface", "Test"]