Add Grafana dashboard for Katana

[kariy]

ref #1369
closes DOJ-134

Add an example Grafana dashboard using Prometheus as data source for Katana showing process and rpc metrics.

• Prometheus config
• Grafana dashboard

[kariy]

• Add Grafana dashboard for Katana #1728 👈
• feat(katana-rpc): rpc server metrics #1726
• Re-export reth-metrics-derive crate from dojo-metrics #1719
• Bump rust to 1.76.0 #1720
• main

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.01%. Comparing base (ad58e43) to head (2e90d5a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1728   +/-   ##
=======================================
  Coverage   68.01%   68.01%           
=======================================
  Files         304      304           
  Lines       32912    32912           
=======================================
+ Hits        22385    22386    +1     
+ Misses      10527    10526    -1     

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[kariy]

adapted from reth grafana dashboard