Support "bumpX" and "bumpY" curve types (#3617)

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## Description

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This PR adds support for using the curve types `bump`, `bumpX` and
`bumpY`. These values have been added to the `CurveType` type and map to
the `curveBumpX` and `curveBumpY` curve factories. Just like `monotone`,
omitting the `X` or `Y` will apply a relevant axis depending on the
`layout`

## Related Issue

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issue first -->
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to reproduce -->
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Fixes #3616

## Motivation and Context

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See related issue. The existing supported curves overlap when used in a
stacked area chart.

## How Has This Been Tested?

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to -->
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I have verified this change for stacked area charts, checked all tests
pass and checked if I needed to write a new test for this curve type. I
found no tests for existing curve types, so did not add any for this
type.

## Screenshots (if appropriate):

![Screenshot 2023-06-08 at 11 11
33](https://github.com/recharts/recharts/assets/19165624/5d3f257b-6600-41c7-8dc3-837f1fa7d6af)


## Types of changes

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the boxes that apply: -->

- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)

## Checklist:

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that apply. -->
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here to help! -->

- [x] My code follows the code style of this project.
- [x] My change requires a change to the documentation.
- [x] I have updated the documentation accordingly.
- [ ] I have added tests to cover my changes.
- [x] All new and existing tests passed.

src/shape/Curve.tsx

@@ -9,6 +9,8 @@ import {
   curveBasisClosed,
   curveBasisOpen,
   curveBasis,
+  curveBumpX,
+  curveBumpY,
   curveLinearClosed,
   curveLinear,
   curveMonotoneX,
@@ -32,6 +34,8 @@ const CURVE_FACTORIES: CurveFactories = {
   curveBasisClosed,
   curveBasisOpen,
   curveBasis,
+  curveBumpX,
+  curveBumpY,
   curveLinearClosed,
   curveLinear,
   curveMonotoneX,
@@ -46,6 +50,9 @@ export type CurveType =
   | 'basis'
   | 'basisClosed'
   | 'basisOpen'
+  | 'bumpX'
+  | 'bumpY'
+  | 'bump'
   | 'linear'
   | 'linearClosed'
   | 'natural'
@@ -73,7 +80,7 @@ const getCurveFactory = (type: CurveType, layout: LayoutType) => {
 
   const name = `curve${_.upperFirst(type)}`;
 
-  if (name === 'curveMonotone' && layout) {
+  if ((name === 'curveMonotone' || name === 'curveBump') && layout) {
     return CURVE_FACTORIES[`${name}${layout === 'vertical' ? 'Y' : 'X'}`];
   }
   return CURVE_FACTORIES[name] || curveLinear;

storybook/stories/API/props/Styles.ts

@@ -106,6 +106,9 @@ export const LineStyle: Args = {
       'basis',
       'basisClosed',
       'basisOpen',
+      'bumpX',
+      'bumpY',
+      'bump',
       'linear',
       'linearClosed',
       'natural',