fix: prevent --literal-pathspecs leaking into git hooks

[disrupted]

Neogit currently adds --literal-pathspecs to all git commands, which causes git to export GIT_LITERAL_PATHSPECS=1 to hooks. Hook managers such as hk can fail when running git stash.

e.g. git error:

pathspec ':/' did not match any file(s) known to git

in this case commits abort with Commit failed before the message editor opens.

This change skips --literal-pathspecs for hook-triggering subcommands (commit/merge/rebase/checkout/push), preventing the env leak while keeping the flag for other commands.