v0.0.2-preview2

What's Changed

• docs: add YShell design documentation by @delichik in #1
• feat: scaffold YShell engineering baseline by @delichik in #2
• Phase 2: SSH & session management — add open/edit/delete/duplicate/import/export and SSH placeholders by @delichik in #5

Full Changelog: https://github.com/delichik/yshell/commits/v0.0.2-preview2