feat: add git worktree command (#824)

custom-completions/git/git-completions.nu

@@ -491,3 +491,70 @@ export extern "git bisect reset" [
 export extern "git help" [
  command: string@"nu-complete git subcommands" # subcommand to show help for
 ]
+
+# git worktree
+export extern "git worktree" [
+ --help(-h) # display the help message for this command
+ ...args
+]
+
+# create a new working tree
+export extern "git worktree add" [
+ --help(-h) # display the help message for this command
+ --force(-f) # checkout <branch> even if already checked out in other worktree
+ -b # create a new branch
+ -B # create or reset a branch
+ --detach(-d) # detach HEAD at named commit
+ --checkout # populate the new working tree
+ --lock # keep the new working tree locked
+ --reason # reason for locking
+ --quiet(-q) # suppress progress reporting
+ --track # set up tracking mode (see git-branch(1))
+ --guess-remote # try to match the new branch name with a remote-tracking branch
+ ...args
+]
+
+# list details of each worktree
+export extern "git worktree list" [
+ --help(-h) # display the help message for this command
+ --porcelain # machine-readable output
+ --verbose(-v) # show extended annotations and reasons, if available
+ --expire # add 'prunable' annotation to worktrees older than <time>
+ -z # terminate records with a NUL character
+ ...args
+]
+
+# prevent a working tree from being pruned
+export extern "git worktree lock" [
+ --help(-h) # display the help message for this command
+ --reason # reason for locking
+ ...args
+]
+
+# move a working tree to a new location
+export extern "git worktree move" [
+ --help(-h) # display the help message for this command
+ --force(-f) # force move even if worktree is dirty or locked
+ ...args
+]
+
+# prune working tree information
+export extern "git worktree prune" [
+ --help(-h) # display the help message for this command
+ --dry-run(-n) # do not remove, show only
+ --verbose(-v) # report pruned working trees
+ --expire # expire working trees older than <time>
+ ...args
+]
+
+# remove a working tree
+export extern "git worktree remove" [
+ --help(-h) # display the help message for this command
+ --force(-f) # force removal even if worktree is dirty or locked
+ ...args
+]
+
+# allow working tree to be pruned, moved or deleted
+export extern "git worktree unlock" [
+ ...args
+]