see https://github.com/karlicoss/HPI/issues/262
* move home to fallback/via_home.py
* move via_ip to fallback
* add fallback model
* add stub via_ip file
* add fallback_locations for via_ip
* use protocol for locations
* estimate_from helper, via_home estimator, all.py
* via_home: add accuracy, cache history
* add datasources to gpslogger/google_takeout
* tz/via_location.py: update import to fallback
* denylist docs/installation instructions
* tz.via_location: let user customize cachew refresh time
* add via_ip.estimate_location using binary search
* use estimate_location in via_home.get_location
* tests: add gpslogger to location config stub
* tests: install tz related libs in test env
* tz: add regression test for broken windows dates
* vendorize bisect_left from python src
doesnt have a 'key' parameter till python3.10
- use portable separators
- paths should be prepended with r' (so backwards slash isn't treated as escaping)
- sqlite connections should be closed (otherwise windows fails to remove the underlying db file)
- workaround for emojis via PYTHONUTF8=1 test for now
- make ZipPath portable
- properly use tox python environment everywhere
this was causing issues on Windows
e.g.
WARNING: test command found but not installed in testenv
cmd: C:\hostedtoolcache\windows\Python\3.9.12\x64\python3.EXE
* core: add ZipPath encapsulating compressed zip files
this way you don't have to unpack it first and can work as if it's a 'virtual' directory
related: https://github.com/karlicoss/HPI/issues/20
