feat: add clock (time)

[Freyskeyd]

Description

This PR initiates the work on the state sync by introducing a clock in order to follow the block production. For now we use a time based clock.

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Patch coverage: 94.80% and project coverage change: +0.23% 🎉

Comparison is base (93d68a5) 52.97% compared to head (a79ec32) 53.21%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #288      +/-   ##
==========================================
+ Coverage   52.97%   53.21%   +0.23%     
==========================================
  Files         214      216       +2     
  Lines       10522    10593      +71     
==========================================
+ Hits         5574     5637      +63     
- Misses       4948     4956       +8     

Files Changed	Coverage Δ
crates/topos-p2p/src/constant.rs	66.66% <ø> (ø)
crates/topos-p2p/src/behaviour/gossip.rs	85.32% <66.66%> (-0.53%)	⬇️
crates/topos-clock/src/lib.rs	93.75% <93.75%> (ø)
crates/topos-clock/src/time.rs	96.49% <96.49%> (ø)
crates/topos-p2p/src/network.rs	82.01% <100.00%> (-0.13%)	⬇️

... and 1 file with indirect coverage changes

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