v0.2.1

Fixes from walking through v0.2.0 the way a newcomer would.

• A bare name is a name, not a handle. --with Kevin used to resolve silently to whoever held the handle kevin, even with a second Kevin in the workspace. Now @handle picks exactly that person, and a bare word searches handles, real names, and display names together: two matches are exit 4 with the candidates, never a guess. users --match lists every match for the same reason. If you scripted --with name against a handle, add the @.
• Archived conversations are marked. channels --include-archived now shows (archived) on those rows in text output.
• Docs. The run-without-installing command works from a clone, the upgrade command rebuilds (uv tool install --force --reinstall .), and the skill can be installed straight from a release zip.

Install the CLI from this release: uv tool install https://github.com/facetdigital/slackline/releases/download/v0.2.1/slackline-0.2.1-py3-none-any.whl (or pipx install the same URL), or from a clone with uv tool install .. Give the skill to every session or one repo: unzip slackline-skill-0.2.1.zip into ~/.claude/skills/ or that repo's .claude/skills/.