Log Message:
devel/git-branchless: import package

git-branchless is a suite of tools which enhances Git in several ways. It makes
Git easier to use, both for novices and for power users.
Examples:
 - git undo: a general-purpose undo command.
 - The smartlog: a convenient visualization tool.
 - git restack: to repair broken commit graphs.
 - Speculative merges: to avoid being caught off-guard by merge conflicts.
 - Patch-stack workflows: strong support for patch-stack workflows as used by
   the Linux and Git projects, as well as at many large tech companies.
 - Prototyping and experimenting workflows: strong support for prototyping and
   experimental work via divergent development.
 - git sync: to rebase all local commit stacks and branches without having to
   check them out first.
 - git move: The ability to move subtrees rather than sticks while cleaning up
   old branches, not touching the working copy, etc.
 - Anonymous branching: reduces the overhead of branching for experimental work.
 - In-memory operations: to modify the commit graph without having to check out
   the commits in question.
 - git next/prev: to quickly jump between commits and branches in a stack.
 - git sw -i/--interactive: to interactively select a commit to switch to.

It provides faster operations for large repositories and monorepos,
particularly at large tech companies.