Function unfoldLevelTree

unfoldLevelTree(
settings: LevelTreeSettings,
): (lowerLimit?: number) => Tree<number>
Unfold a perfectly balanced tree from the given settings.

The numeric argument for the TreeUnfold<number,number> returned, is the lower limit for the depth and you would usually want the default 1.

When the limit is 1 and the depth is 7, then 7 levels will be build. If the depth is 7 but the limit is 3, only 4 levels will be built, and the root node value will be 4.

In a level tree, the value of every node is its depth. This, for example, is a level tree:
```
┬1
├─2
├─2
├┬2
│├─3
│└─3
└─2
```
Parameters
- settings: LevelTreeSettings
Returns (lowerLimit?: number) => Tree<number>
Example
```
import {unfoldLevelTree, Draw} from 'effect-tree'

const tree = unfoldLevelTree({depth: 4, degree: depth => 3 - depth})()

expect(Draw.drawTree.number(tree)).toEqual([
 '┬1   ',
 '├┬2  ',
 '│└┬3 ',
 '│ └─4',
 '└┬2  ',
 ' └┬3 ',
 '  └─4',
 ])
```
- Defined in src/ops/levels.ts:210