feat: Implement route and weather visualizer

[ShashaankS]

Combined Route(GeoJSON) and weather(NetCDF) visualizer

What it does

• Load either a WRT route GeoJSON (FeatureCollection of Point waypoints) or weather dataset (NetCDF) or both via a file picker.

• Draws the route as a styled line, source/destination flags, an inspectable waypoint layer, and a heading-aware sailboat marker.

• Animates the boat along the route and the weather with a Play/Pause control, adjustable step speed (ms/step), and a scrub slider.

• Live stats panel showing speed, engine power, and fuel consumption for the current waypoint, with a collapsible Advanced section for calculating the subset calculations like :

  1. Min
  2. max
  3. Mean
  4. Median
  5. frequency distribution histogram.

• Auto-frames the canvas to the loaded route's/weather extent.

Screenshots

[MartinPontius]

Looks good to me.
I have only a few observations/questions:

• The ship is often upside down. Does that have to do with the bearing? Maybe we should also show the bearing, e.g. in the feature info or as label on the map next to the ship?
• The minimal frame time is 50 ms. Is this hard-coded by us or restricted by QGIS/PyQt?
• The initial zoom seems to be always at (0, 0) and not where the route is.