Add ticks to PolarAxis

[ffreyer]

Description

Fixes #4773

When I saw the issue I thought this just needed some modifications of PolarAxis but there are actually no ticks yet. This pr adds them.

On the attributes mentioned in the issue:

• color, visible, width, size is self explanatory
• align controls to which side of the frame/grid the ticks are drawn (0 on ticklabel side, 1 opposite side)
• mirrored may make sense for circle sectors with or without rmin > 0, as there is an opposite side to mirror to

TODO:

• add rticks and theta ticks
• add minor ticks
• consider adding ticksmirrored
• refimg tests
• test tick label rotations with different combinations of direction & ticksmirrored
• docs/example

Example

f = Figure()
a = PolarAxis(f[1,1],
    rticksvisible = true, rticksize = 10, rtickwidth = 4, rtickcolor = :red,
    thetaticksvisible = true, thetaticksize = 10, thetatickwidth = 4, thetatickcolor = :blue
)
f

Type of change

• New feature (non-breaking change which adds functionality)

Checklist

• Added an entry in CHANGELOG.md (for new features and breaking changes)
• Added or changed relevant sections in the documentation
• Added unit tests for new algorithms, conversion methods, etc.
• Added reference image tests for new plotting functions, recipes, visual options, etc.

[MakieBot]

Benchmark Results

SHA: 39300418bb9823d5a5f09e106298e1fdf6837af7

Warning

These results are subject to substantial noise because GitHub's CI runs on shared machines that are not ideally suited for benchmarking.

[ffreyer]

I think I got mirroring working though I'm interpreting it differently from Axis. In Axis it only moves ticks. Moving tick labels happens through xaxisposition = :top/:bottom and yaxisposition = :left/:right. For PolarAxis I'm letting r/thetaticksmirrored handle that too, because left/right/bottom/top changes with ax.direction and axis rotation.