--- @brief
---
--- Install, update, and delete external plugins. WARNING: It is still considered
--- experimental, yet should be stable enough for daily use.
---
---Manages plugins only in a dedicated [vim.pack-directory]() (see |packages|):
---`site/pack/core/opt` subdirectory of "data" |standard-path|. Subdirectory `site` of "data"
---standard path needs to be part of 'packpath'. It usually is, but might not be
---in cases like |--clean| or setting |$XDG_DATA_HOME| during startup.
---Plugin's subdirectory name matches plugin's name in specification.
---It is assumed that all plugins in the directory are managed exclusively by `vim.pack`.
---
---Uses Git to manage plugins and requires present `git` executable.
---Target plugins should be Git repositories with versions as named tags
---following semver convention `v<major>.<minor>.<patch>` (with or without `v` prefix).
---Like `v1.2.0` or `1.2.0`, but not `1.2` or `v1`.
---
---The latest state of all managed plugins is stored inside a [vim.pack-lockfile]()
---located at |'packlockfile'|.
| 