feat: add paseo support

[evilrobot-01]

Adds chain-spec-generator support, so that pop up can be used to launch local paseo, kusama and polkadot networks.

[codecov]

Codecov Report

Attention: Patch coverage is 85.63380% with 102 lines in your changes missing coverage. Please review.

Project coverage is 67.94%. Comparing base (baacdd3) to head (b6fc316).
Report is 1 commits behind head on main.

@@            Coverage Diff             @@
##             main     #182      +/-   ##
==========================================
+ Coverage   65.16%   67.94%   +2.78%     
==========================================
  Files          37       39       +2     
  Lines        5069     5665     +596     
  Branches     5069     5665     +596     
==========================================
+ Hits         3303     3849     +546     
+ Misses       1248     1231      -17     
- Partials      518      585      +67     

Files	Coverage Δ
crates/pop-parachains/src/up/sourcing.rs	86.58% <89.47%> (+0.07%)	⬆️
crates/pop-cli/src/commands/up/parachain.rs	7.77% <0.00%> (-1.08%)	⬇️
crates/pop-parachains/src/up/relay.rs	85.36% <80.95%> (-0.51%)	⬇️
crates/pop-parachains/src/up/parachains.rs	86.38% <83.75%> (+0.89%)	⬆️
crates/pop-parachains/src/up/chain_specs.rs	83.33% <83.33%> (ø)
crates/pop-parachains/src/up/mod.rs	87.95% <87.90%> (+0.82%)	⬆️

... and 11 files with indirect coverage changes

[AlexD10S]

Great job. Support for other chains, such as asset-hub and bridge-hub... can be easily added if needed.