Enhance provider to add resync() method

[earthman1]

resync method is same as walk, but will take a path to a file or folder. Walk only accepts folders.

[codecov]

Codecov Report

Merging #359 (7f97121) into master (44d787e) will decrease coverage by 3.78%.
The diff coverage is 100.00%.

@@ Coverage Diff @@## master #359 +/- ##
==========================================
- Coverage 89.33% 85.54% -3.79% 
==========================================
Files 29 33 +4 Lines 4502 6408 +1906 Branches 854 1191 +337 ==========================================
+ Hits 4022 5482 +1460 - Misses 294 616 +322 - Partials 186 310 +124 

Impacted Files	Coverage Δ
cloudsync/provider.py	91.05% <100.00%> (-2.23%)	⬇️
cloudsync/sync/sqlite_storage.py	83.11% <0.00%> (-2.22%)	⬇️
cloudsync/event.py	92.97% <0.00%> (-1.92%)	⬇️
cloudsync/runnable.py	92.10% <0.00%> (-0.82%)	⬇️
cloudsync/command/utils.py	92.24% <0.00%> (-0.73%)	⬇️
cloudsync/oauth/apiserver.py	81.58% <0.00%> (-0.69%)	⬇️
cloudsync/smartsync.py	90.37% <0.00%> (-0.54%)	⬇️
cloudsync/sync/manager.py	86.21% <0.00%> (-0.01%)	⬇️
cloudsync/__main__.py	0.00% <0.00%> (ø)
... and 10 more

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[earonesty]

can we add the @deprecated decorator to walk?

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
4 Code Smells

No Coverage information
0.0% Duplication