chore: add Iggy banner to server startup

[spetz]

[hubcio]

this is truly an outstanding contribution! looks so good.

[spetz]

Improved banner

[codecov]

Codecov Report

❌ Patch coverage is 0% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 34.40%. Comparing base (b87b6a6) to head (548da0a).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
core/server/src/banner.rs	0.00%	24 Missing ⚠️
core/server/src/main.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #4085       +/-   ##
=============================================
- Coverage     85.90%   34.40%   -51.50%     
  Complexity     1431     1431               
=============================================
  Files          1244     1245        +1     
  Lines        192435   157721    -34714     
  Branches     158133   123419    -34714     
=============================================
- Hits         165307    54261   -111046     
- Misses        23037   102012    +78975     
+ Partials       4091     1448     -2643     

Components	Coverage Δ
Rust Core	20.06% <0.00%> (-66.77%)	⬇️
Java SDK	67.52% <ø> (ø)
C# SDK	76.99% <ø> (+0.01%)	⬆️
Python SDK	90.54% <ø> (ø)
PHP SDK	85.65% <ø> (ø)
Node SDK	96.14% <ø> (-0.11%)	⬇️
Go SDK	69.43% <ø> (+0.03%)	⬆️

Files with missing lines	Coverage Δ
core/server/src/main.rs	0.00% <0.00%> (-66.67%)	⬇️
core/server/src/banner.rs	0.00% <0.00%> (ø)

... and 650 files with indirect coverage changes

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