State labels: new label placing algorithm

[Azgaar]

Description

New placing algorithm for state labels - now state labels should be less curvy and take more optimal position. Migrated from #842 with a few issues fixed.

Old Algorithm:
Custom implementation of the centerline labeling. Build voronoi to define a centerline and place label based on it.
https://observablehq.com/@veltman/centerline-labeling

Pros:

• cool
• fast enough

Cons:

• complex to tweak
• places labels in chaotic directions

New algorithm:
For each state we cast rays from the state's pole of inaccessibility to define which label position is optimal. Horizontal positions take advantage, vertical is discouraged.

Pros:

• simple
• prefers horizontal positioning
• fast enough

Const:

• positions are still not optimal, better detection will take more time

Type of change

• New feature

Versioning

• Version is updated
• Changed files hash is updated

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