Dashed Path support for Line Layer

[anshu7vyas]

Description

This pull request enables users to add a android.graphics.PathEffect of their choice to the LineCartesianLayer.

Why?

On occasion, the design team may require a dashed pattern for the lines on the Line Layer. There's also an ongoing discussion about adding support for a Dashed Line

• #469

With this update, users can add any PathEffect they prefer, allowing them more flexibility than just a dashed effect.

How?

First, I added a nullable pathEffect property to the LineSpec in /core/cartesian/layer/LineCartesianLayer.kt class. Utilizing the library's extensive APIs, I assigned this pathEffect to linePaint within the drawLine() function.

Next, I updated the rememberLineSpec() function in /compose/cartesian/layer/LineCartesianLayer.kt to include the pathEffect property.

And finally, I updated the sample application by using the pathEffect property on Chart9. This shows how simple it is to add a new line effect.

What does that look like?

Default Behavior	with DashPathEffect

Default Behavior	with DashPathEffect