feat: add multi-target Typechain typings build option

[JDawg287]

Description

This PR extends the current Hardhat compile task and adds an option to specify the desired target you want to build for Typechain typings. The default target is ethers-v6, which is currently being used by different tests and external scripts.

Fixes TP-889

Additions and Changes

• Added the compile task override in the hardhat.config.ts
• Adapted multiple tests and scripts to the default outDir for Typechain typings

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works