📝 Add docstrings to `edison/refactor/hydrationNode`

📝 Add docstrings to `edison/refactor/hydrationNode`

Docstrings generation was requested by @edison1105.

* https://github.com/vuejs/core/pull/14340#issuecomment-3770870707

The following files were modified:

* `packages/compiler-vapor/src/generators/operation.ts`
* `packages/compiler-vapor/src/generators/template.ts`
* `packages/compiler-vapor/src/transforms/transformChildren.ts`
* `packages/runtime-vapor/src/dom/hydration.ts`
* `packages/runtime-vapor/src/dom/node.ts`
* `packages/runtime-vapor/src/insertionState.ts`