factor code to smaller crates

[zancas]

• async and tokio runtime are factored into a cli specific trait
• consts are moved to config
• get_initial_state migrates from config -> lightclient

[codecov-commenter]

Codecov Report

Merging #20 (0bc3a60) into dev (5376dee) will decrease coverage by 0.05%.
The diff coverage is 25.58%.

@@            Coverage Diff             @@
##              dev      #20      +/-   ##
==========================================
- Coverage   58.28%   58.22%   -0.06%     
==========================================
  Files          31       31              
  Lines        5832     5838       +6     
==========================================
  Hits         3399     3399              
- Misses       2433     2439       +6     

Impacted Files	Coverage Δ
cli/src/lib.rs	0.00% <0.00%> (ø)
cli/src/main.rs	0.00% <ø> (ø)
config/src/lib.rs	40.29% <ø> (ø)
lib/src/wallet/keys.rs	45.86% <ø> (ø)
lib/src/lightclient.rs	60.68% <62.50%> (-0.02%)	⬇️
lib/src/lightclient/lightclient_config.rs	30.69% <100.00%> (+1.28%)	⬆️

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[AloeareV]

Looks pretty good!