Fixes issue where dotDir with trailing slash caused failures.
Refactors lib.nix to use raw paths internally, fixing issues with spaces
in paths.
Updates history.path logic to correctly handle raw absolute paths.
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>
Previously, `config.programs.zsh.dotDir` prepended strings with `$HOME`.
This caused issues like nix-community#5100, where `$HOME` is
inconsistently resolved in time for the evaluation of the option. The handling
of this variable is also inconsistent with how paths are handled elsewhere,
including within the same module, where `config.programs.zsh.history.path`
does not mutate the supplied string.
To preserve backwards compatibility, this change prepends
`config.home.homeDirectory` to relative paths, while assigning absolute paths
unchanged. Tests for both cases are added.
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>
