Add SyncManager to Web5 Managed Agent

[frankhinek]

This PR will:

• Re-introduce this sync implementation to restore sync capability.
• Resolves an issue with the original sync implementation with cascading echoes that would occur due to random lexicographical ordering of sync jobs. Unresolved is a single echo after a pull operation, which is tracked in Issue Resolve pull "echo" with sync implementation #207.
• Resolves Issue Make sync configurable #95.
• Previously sync had no tests so basic tests have been added for push() and pull(). Testing for more scenarios and edge cases is needed, which is tracked in Issue Improve test coverage for SyncManager #206
• Temporarily adds utility methods to DwnManager that should be refactored as tracked in Issue Refactoring needed for DwnManager and SyncManager #205.
• Adds SyncManager to the tests / test agents.
• Improves test coverage in the @web5/agent package for DwnManager handling EventsGet, MessagesGet, ProtocolsConfigure, and ProtocolsQuery.
• Adds test coverage in the @web5/api package for Protocol.

[mistermoe]

🥇

[codecov]

Codecov Report

Merging #204 (49d8826) into main (8204a49) will decrease coverage by 0.86%.
The diff coverage is 73.78%.

@@            Coverage Diff             @@
##             main     #204      +/-   ##
==========================================
- Coverage   90.28%   89.42%   -0.86%     
==========================================
  Files          63       64       +1     
  Lines       11592    12399     +807     
  Branches     1132     1188      +56     
==========================================
+ Hits        10466    11088     +622     
- Misses       1106     1291     +185     
  Partials       20       20              

Components	Coverage Δ
api	94.32% <77.50%> (-0.74%)	⬇️
common	95.00% <ø> (ø)
credentials	∅ <ø> (∅)
crypto	94.87% <ø> (ø)
dids	92.16% <ø> (-0.01%)	⬇️
agent	87.80% <76.58%> (-1.38%)	⬇️
identity-agent	59.05% <33.33%> (-1.45%)	⬇️
proxy-agent	58.59% <33.33%> (-1.41%)	⬇️
user-agent	57.36% <33.33%> (-1.32%)	⬇️