docs: rename spec to kernel-consolidation (covers more than networking)

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

Author: NathanFlurry

…specs/kernel-networking-consolidation.md …s-internal/specs/kernel-consolidation.mddocs-internal/specs/kernel-networking-consolidation.md renamed to docs-internal/specs/kernel-consolidation.md docs-internal/specs/kernel-networking-consolidation.md renamed to docs-internal/specs/kernel-consolidation.md

@@ -1,4 +1,6 @@
-# Kernel Networking & Resource Consolidation
+# Kernel Consolidation
+
+Networking, resource management, and runtime-specific subsystems that need to move into the shared kernel.
 
 ## Problem