* Refactor and move `completion` package to `internal/completions`
* Move `cli` and `repotest` packages to `internal/cli`
* Use passed version information for `--version` flag
* Add simple test for completions package
* Replace direct `fmt.Println()` usage in a test with `t.Log()`
* Rename `cmd` to `cli`
* Move asdf command from module root
* Fix some linter warnings, thus enabling some tests that were being skipped
* Fix `Makefile`
* Rename module to `github.com/asdf-vm/asdf`
* Fix `TestGetAllToolsAndVersionsInContent/returns_empty_list_with_found_true_and_no_error_when_empty_content`
* Rewrite `Unique()` to be a bit more straightforwards
* Get workflow checks passing again
toolversions.Unique is ever so slightly faster, technically.
```
goos: linux
goarch: amd64
pkg: github.com/asdf-vm/asdf/internal/toolversions
cpu: AMD Ryzen 9 3900X 12-Core Processor
│ /tmp/old.txt │ /tmp/new.txt │
│ sec/op │ sec/op vs base │
Unique-24 346.5n ± 1% 342.4n ± 1% -1.17% (p=0.027 n=10)
│ /tmp/old.txt │ /tmp/new.txt │
│ B/op │ B/op vs base │
Unique-24 160.0 ± 0% 160.0 ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
│ /tmp/old.txt │ /tmp/new.txt │
│ allocs/op │ allocs/op vs base │
Unique-24 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
```
* Create `toolversions.ParseSlice` function
* Create `toolversions.Format` function
* Refactor `shims` package to use `toolversions.Version` struct
* Fix handling of path versions in `shims.FindExecutable` function
* Create `CurrentEnv` and `MergeEnv` helper functions
* Add another test for `paths.RemoveFromPath` function
* Move executable finding functions to shims package
* Correct PATH code for env and exec commands
* Create `CallbackPath` method on `Plugin` struct
* Correct behavior of `asdf shimversions` command
* Update `shims.FindExecutable` function to return plugin
* Create `repotest.WritePluginCallback` function
* Create `execenv` package for invoking `exec-env` plugin callback
* Make `MapToSlice` a public function
* Return resolved version from `shims.FindExecutable` function
* Create `shims.ExecutablePaths` function
* Enable `shim_env_command.bats` tests
* Implement `asdf env` command
* create `repotest.WritePluginCallback` function
* add test for `list-bin-paths` callback that returns non-existent path
* if directory name returned by `list-bin-paths` doesn't exist skip it
* Get more shim_exec.bats tests passing by adding shebang lines to test scripts
* Disable shim_exec test case for scenario that is no longer possible
* Add documentation on another breaking change
* Create toolversions.Version struct and update code to use new struct
* Create help package
* Add help command
* Enable help command BATS tests
* Implement functions in help package
* Write tests
* Correct function call in `installPlugin` test helper in shims package
* create asdf which command
* enable which_command.bats tests
* add more info to NoExecutableForPluginError
* Write tests for shims.GetExecutablePath function
* Use plugin `exec-path` callback when present to compute executable
path
* Generate shims after version install
* Enable `reshim_command.bats` tests
* Remove `update_command.bats` tests from main_test.go
* Update `installs` package functions to accept version type in addition to version value
* Update `versions.ParseString` function to handle path version
* Move invocation of hooks for reshim
* Update `asdf reshim` command so shims can be generated for path versions
* Rename `versions.Installed` function to `IsInstalled`
* Create `versions.Installed` function
* Create `shims.GenerateForPluginVersions` and `shims.GenerateAll` functions
* Address linter warnings
* Create asdf reshim command
* Run asdf hook from new `shims` functions
* Add `x/sys` as a dependency
* Create `toolversions.Unique` function
* Create `shims` package with `ExecutablePaths`, `PluginExecutables`, `Write`, `GenerateForVersion` function
* Address linter warnings
