v0.2.0

Adds git worktree support.

• New project segment (⬢ repo-name) resolved from the main repo root via git rev-parse --git-common-dir, so it stays stable across every linked worktree. Hidden outside a git repo, off by default.
• New VL_NAME_MAX knob to truncate the project and git names. Uses middle-truncation, so branches that share a long prefix stay distinguishable instead of collapsing to the same string.

Both default off, so existing setups render identically.

Thanks to @redtear1115 for proposing and implementing the project segment (#2, #3).