Add src/cmd/project.rs with handlers for all five ProjectAction variants
(init, bind, unbind, delete, list). Wire dispatch in cmd/mod.rs.

Remove the now-superseded src/cmd/init.rs, use.rs, and projects.rs modules.
Update the two error strings in cmd/sync.rs that still referenced td init.

Replace the flat Init, Use, and Projects top-level commands with a single
Project { action: ProjectAction } variant and a ProjectAction enum covering
Init, Bind, Unbind, Delete, and List.

Add unbind_project() and delete_project() to the db layer. Update the three
error strings that still referenced the old command names.

The Loro migration stripped the verbose breakdown down to just an ID and
final score. Restore the three pieces that were lost:

- Active scoring mode printed once before the per-task list
- Expanded formula with actual values substituted, branching on mode:
    impact: (downstream + 1.00) × priority / effort^0.25 = score
    effort: (downstream × 0.25 + 1.00) × priority / effort² = score
- Unblocks count: N tasks (M directly), with correct singular/plural

All data was already present in ScoredTask; only the rendering in
src/cmd/next.rs needed updating.

Update the two cli_next verbose tests whose assertions reflected the old
'score:' label rather than the restored output. Add two new tests
covering the singular 'task' grammar and transitive unblocks counts,
both of which were untested before.

short() and display_id() now emit td-XXXXXXX instead of bare suffixes.
resolve_task_id() strips the prefix on input so both forms are accepted.

next extracted task IDs as raw ULID strings for the scoring engine
then displayed those same strings. rm did the same with unblocked_ids
in its warning message. Both now go through TaskId::Display or
display_id() at render time.

Add display_id() to TaskId for contexts where a raw &str needs
shortening without constructing a TaskId.

Impact mode formula changed from (ds+1)×pw/ew to (ds+1)×pw/ew^0.25
so that effort no longer perfectly cancels priority for standalone
tasks. High-priority high-effort work now ranks above medium-priority
low-effort work, matching impact mode's intent of favoring importance
over cost.

Embedding raw ANSI escape codes in cell strings causes comfy-table to
count them as visible characters when calculating column widths, shifting
headers out of alignment with their data columns.

Replace format!() with raw escapes with Cell::fg() and
Cell::add_attribute() across list, ready, next, and search. Add
cell_bold() and cell_fg() helpers in color.rs that conditionally apply
styling based on the existing NO_COLOR / TTY checks.

Cover both scoring modes, verbose output, limit, empty case, and JSON
output. Update SKILL.md and README.md.

Add next to cli.rs, cmd/next.rs, and cmd/mod.rs. Queries open tasks and
blocker edges from the DB, feeds them to score::rank(), and renders
results using comfy-table with a header row.

Add src/score.rs with the core algorithm for the next command: build the
blocker DAG from open tasks, compute transitive downstream scores, and
rank ready tasks using mode-dependent formulas.

show displays all blocker edges regardless of status, making tasks appear
blocked when their blockers are closed. Split the display into open
blockers (actually blocking) and resolved ones.

list and ready display priority and effort as bare low/medium/high in
adjacent columns with nothing distinguishing them. Add a header row to
each using comfy-table's set_header().

Replace hardcoded format!() spacing with comfy-table across all commands.
Fix missing effort column in list output.