test: migrate tests from unit to e2e

[jdx]

these are covered by e2e tests (at least well enough for now) and I want to remove unit tests that modify file state. One reason for this is I basically need it to work on windows.

[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-main x -- echo	19.2 ± 0.6	18.0	21.3	1.01 ± 0.04
mise-2024.11.30 x -- echo	19.1 ± 0.6	17.9	22.5	1.00
mise x -- echo	19.3 ± 0.7	17.9	26.4	1.01 ± 0.05

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-main env	15.6 ± 0.6	14.5	18.7	1.01 ± 0.05
mise-2024.11.30 env	15.5 ± 0.5	14.4	17.0	1.00
mise env	15.7 ± 0.5	14.6	17.3	1.02 ± 0.05

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-main hook-env	15.6 ± 0.6	14.5	18.6	1.00
mise-2024.11.30 hook-env	15.7 ± 0.8	14.4	21.7	1.01 ± 0.06
mise hook-env	15.6 ± 0.6	14.5	17.8	1.00 ± 0.05

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-main ls	13.1 ± 0.3	12.5	17.1	1.02 ± 0.04
mise-2024.11.30 ls	12.8 ± 0.3	12.1	14.8	1.00
mise ls	13.1 ± 0.3	12.6	14.5	1.03 ± 0.04

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -29.41%	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (f246584)	22401	17147	76.55%
Head commit (bcf14e3)	42622 (+20221)	20089 (+2942)	47.13% (-29.41%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#3231)	45	45	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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