implemented chunked file upload v2

[bigcat88]

There are two versions of the chunking API. Version 1 is the original version and version 2 was built as a backward compatible extension to support uploads directly to supporting target storages like S3. Version 2 is the recommended version to use.

---

https://docs.nextcloud.com/server/latest/developer_manual/client_apis/WebDAV/chunking.html

[codecov]

Codecov Report

Merging #130 (0b7a157) into main (b59fd9e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #130   +/-   ##
=======================================
  Coverage   99.73%   99.73%           
=======================================
  Files          32       32           
  Lines        2622     2632   +10     
=======================================
+ Hits         2615     2625   +10     
  Misses          7        7           

Files	Coverage Δ
nc_py_api/_session.py	98.44% <100.00%> (+0.01%)	⬆️
nc_py_api/files/files.py	99.25% <100.00%> (+0.01%)	⬆️
nc_py_api/options.py	100.00% <100.00%> (ø)