feat: added custom toolchains support

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 93.50649% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 92.51%. Comparing base (de12b65) to head (3068396).

Files	Patch %	Lines
src/version/location.ts	85.00%	3 Missing :warning:
src/installer/verify.ts	66.66%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #273 +/- ## ========================================== + Coverage 89.72% 92.51% +2.78% ========================================== Files 30 31 +1 Lines 954 1015 +61 Branches 138 147 +9 ========================================== + Hits 856 939 +83 + Misses 98 76 -22 ```

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