feat: expand tilde to home dir

[rtkay123]

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Expand ~/ to current user's home directory on unix

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 86.20690% with 4 lines in your changes missing coverage. Please review.

Project coverage is 51.4%. Comparing base (85847d4) to head (e16e262).

Files with missing lines	Patch %	Lines
crates/mirro-rs/src/config/mod.rs	50.0%	2 Missing :warning:
crates/mirro-rs/src/utils/tilde.rs	92.0%	2 Missing :warning:

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Additional details and impacted files

Files with missing lines	Coverage Δ
crates/mirro-rs/src/main.rs	0.0% <ø> (ø)
crates/mirro-rs/src/config/mod.rs	53.4% <50.0%> (+0.5%)	:arrow_up:
crates/mirro-rs/src/utils/tilde.rs	92.0% <92.0%> (ø)