Add stacking and networking capabilities to asf_search

[forrestfwilliams]

As multiburst InSAR and ARIA GUNW InSAR become more popular, we need to make it easier for our users to create stacks and networks of ASF products. This draft PR starts down this road. You can test out its capabilities using the code:

from dateutil.parser import parse as parse_date
from shapely import from_wkt

import asf_search as search
from asf_search import constants

stack_wkt = 'POLYGON((-122.4758 37.6923,-122.4526 37.6923,-122.4526 37.756,-122.4758 37.756,-122.4758 37.6923))'
stack_start = parse_date('2024-01-01 00:00:00Z')
stack_end = parse_date('2024-03-01 00:00:00Z')
search_result = search.geo_search(
    intersectsWith=stack_wkt,
    start=stack_start,
    end=stack_end,
    relativeOrbit=35,  # TODO: don't constrain by this
    beamMode=constants.BEAMMODE.IW,
    polarization=constants.POLARIZATION.VV,
    platform=constants.PLATFORM.SENTINEL1,
    processingLevel=constants.PRODUCT_TYPE.BURST,
)
stack = search.ASFStack(search_result)
network = stack.construct_network(30, 300)
network.plot()

TODOS:

• Add validation of groups/stacks
• Account for incrementing absolute orbit at ascending node crossing
• limit to bursts for now
• docstrings
• tests

Intentional omissions to be done later:

• Support for everything but bursts
• Advanced/interactive plotting
• Network customization

[williamh890]

Possible interface for constructing networks from stacks

stack = search.ASFStack(search_result)
network = stack.construct_network(prep, temp)
network.plot()