Add script to generate abis

[noslav]

• ABIs should be committed to repo for easy access for future use-cases in interacting with CXT token
• Adds script to generate build using forge and generate ABI's
• Commit ABIs extracted from compilation
• Run with npm run abi

FIX

npm run abi                                                                                                                                                                                                                 ─╯

> cxt@1.0.0 abi
> forge build && ./gen-abi.sh

[⠊] Compiling...
[⠔] Compiling 14 files with 0.8.21
[⠑] Solc 0.8.21 finished in 43.21s
Compiler run successful with warnings:
Warning (2072): Unused local variable.
  --> script/ChangeImpl.sol:17:9:
   |
17 |         address treasury = address(deployerAdmin);
   |         ^^^^^^^^^^^^^^^^

Warning (2072): Unused local variable.
  --> script/ChangeImpl.sol:18:9:
   |
18 |         address migrationProxy = 0x136FE32D4a0Bc1B4f4Ef7100A2a6ee17593b8E26;
   |         ^^^^^^^^^^^^^^^^^^^^^^

Warning (2072): Unused local variable.
  --> script/ChangeImpl.sol:31:9:
   |
31 |         ProxyAdmin admin = ProxyAdmin(_admin);
   |