Truncate names in output

[strboul]

Truncate the names in the output, including:

• repo,
• branch,
• status,
• stash,
• worktree status,
• etc.

If the name is greater than n, e.g. 16 characters, get the first n chars and put use Unicode horizontal ellipsis … (U+2026) on the 17th char to imply that the branch name is actually truncated.

TODO

• argument --no-truncated-names that shows the full names always.