feat: add initial metrics for p2p comms

[maschad]

• Closes Track Gossipsub and libp2p metrics #432
• Closes Track bandwidth of a Node #416

Related to #410

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 60.58824% with 201 lines in your changes missing coverage. Please review.

Project coverage is 67.06%. Comparing base (b7e8c14) to head (0000a5d).
Report is 63 commits behind head on main.

Files with missing lines	Patch %	Lines
atoma-p2p/src/metrics.rs	0.00%	152 Missing ⚠️
atoma-p2p/src/utils.rs	29.54%	31 Missing ⚠️
atoma-p2p/src/service.rs	0.00%	15 Missing ⚠️
atoma-p2p/src/tests.rs	98.99%	3 Missing ⚠️

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@@            Coverage Diff             @@
##             main     #435      +/-   ##
==========================================
+ Coverage   66.63%   67.06%   +0.42%     
==========================================
  Files          43       49       +6     
  Lines        7646     9100    +1454     
==========================================
+ Hits         5095     6103    +1008     
- Misses       2551     2997     +446     

Files with missing lines	Coverage Δ
atoma-p2p/src/timer.rs	0.00% <ø> (ø)
atoma-p2p/src/types.rs	95.89% <ø> (ø)
atoma-p2p/src/tests.rs	98.99% <98.99%> (ø)
atoma-p2p/src/service.rs	0.00% <0.00%> (ø)
atoma-p2p/src/utils.rs	29.54% <29.54%> (ø)
atoma-p2p/src/metrics.rs	0.00% <0.00%> (ø)

... and 4 files with indirect coverage changes

[jorgeantonio21]

LGTM

Left a few minor comments, let's address these and then merge it

[jorgeantonio21]

LGTM