* 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
* Create asdf current command
* Correct output of asdf exec command when no command is provided
* Enable current_command.bats tests
* Fix current_command.bats test code
* 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
* Get asdf info BATS tests working
* Create `versions.Installed` function
* Update `versions.Latest` to return single version
* Implement `latest` asdf command
* Implement info command
* Remove duplicate and unneeded BATS tests from `main_test.go`
* remove download dir for plugin when removing plugin
* update plugins.Add function so downloads directory is created
* Create `pluginindex.Build` function
* Use `pluginindex` when no plugin URL provided for plugin add command
* Get more `plugin_add_command` BATS tests passing against Golang version
* Only use `pluginindex` when it is not disabled
* Update error message so it matches legacy format
* Add staticcheck.conf
* Simplify BATS test Golang code
* Update plugin add test to new command format
* Correctly set `ASDF_DATA_DIR` for BATS tests
* Rename `PluginAdd` function to `Add`
* Create `plugin.Remove` function
* Make plugin remove command invoke `plugin.Remove` function
* remove underscores from function names (addresses warnings from revive linter)
* create installMockPluginRepo function
* implement plugin list command
* rename commands package to cmd
* add go-ini as a dependency
* write code to parse asdfrc file into Settings struct
* add go-envconfig as a dependency
* add go-homedir as a dependency
* implement first version of LoadConfig function to load environment variables into Config struct
