feat: new session project picker — choose directory before starting (#12

)

n now opens a project picker overlay instead of launching claude
immediately. CWD is pre-selected and tagged (current dir); all known
projects from the session list are shown below. Type to filter by path,
up/down to navigate, enter starts the session.

Uses the same overlay pattern as the move picker. buildNewPickerProjects
places CWD at index 0 regardless of whether it has existing sessions.

Closes #11

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

fix: fix broken rename

Signed-off-by: Alexander Matyushentsev <alexander@akuity.io>

ci: upgrade to golangci-lint-action v7

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

fix: don't load sessions without path

Signed-off-by: Alexander Matyushentsev <alexander@akuity.io>