[Lane 2 · kotlin-core] NotImplemented stubs — remove or implement TensorDefineDslImpl.create() #1417

Sub-issue of #1414 ([Feature]: Close the remaining NotImplemented stubs outside the operator surface).

Lane: 2 · Kotlin core
Skill needed: Kotlin. Mostly code archaeology.
Size: xs (under 1 hour)
Blocked by: nothing

What to do

1. TensorDefineDslImpl.create() in skainet-lang/skainet-lang-core/src/commonMain/kotlin/sk/ainet/lang/tensor/dsl/TensorDSL.kt is TODO("Not yet implemented").
2. Find out whether anything reaches it (tensor {} works through another path). If nothing does, delete the dead code; otherwise implement it by delegating to the working path.
3. Delete the file's line from config/stub-allowlist.txt; run ./gradlew :skainet-lang:skainet-lang-core:jvmTest apiCheck checkUnmarkedStubs (run apiDump if you removed public API and say so in the PR).

Acceptance

• No TODO() left in TensorDSL.kt
• Result reported back on the parent issue

Notes

If something here turns out to be wrong or much bigger than the size label, comment on this issue or open a specific bug instead of blocking the parent.

Coverage matrix: docs/modules/ROOT/pages/reference/ops-status-matrix.adoc · How lanes work: Issue taxonomy