rasterize: invalid resolution and chunks values are accepted (chunks=0 hangs)

[brendancol]

Describe the bug

rasterize() accepts invalid values for resolution and chunks instead of rejecting them.

resolution:

• resolution=-1 produces a 1x1 raster
• resolution=inf produces a 1x1 raster
• resolution=0 raises ZeroDivisionError
• resolution=nan raises an opaque integer conversion error

chunks:

• chunks=0 hangs the process. _normalize_chunks() loops while remaining > 0 and subtracts min(rchunk, remaining) from remaining. With rchunk=0 the subtraction is zero and the loop never terminates.
• Negative chunks makes remaining grow without bound.

Expected behavior

Validate resolution is finite and > 0 before any dimension math, with a clear ValueError. Validate chunks > 0 at the top of _normalize_chunks().

Files: xrspatial/rasterize.py:2230, xrspatial/rasterize.py:1520