Extract climb detection into a dedicated climb package

Move climb detection, slope, and Cotacol scoring out of ride into a new
climb package that operates on a geometry-only Route (distances, elevations,
coords). Ride embeds climb.Route and keeps its timing and telemetry columns.

- climb.Detect returns []DetectedClimb (Climb + ride-absolute Start).
- Climb owns its sliced geometry; indices are local, with Start reported at
  the detection boundary for absolute position.
- Detected bounds use core.Interval; freeRegions claim suppression fixed.
- ride no longer builds slices: ClimbFromDist/ClimbFromIndexes/climbFrom and
  ride.Climb/Interval/Range are removed; rideanalysis, mountain_pass MatchClimb,
  and web views are rewired to climb types.
- New internal/routetest builds climb.Route from the ride DSL; ridetest reuses
  it and adds timestamps and telemetry.
- Tests moved to climb (synthetic detection and difficulty) and kept in ride
  for GPX-example integration; ride.comparison detection coverage retained.
- mountain_pass.nearestCrossing now reuses geo.Nearest.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 4d9a1f8..1ae3a8b 100644
--- a/README.md
+++ b/README.md
@@ -154,7 +154,7 @@ Add `github.com/grafana/pyroscope-go` and call `pyroscope.Start` with `ServerAdd
 
 ## TODO
 
-- use interval
+- pyroscope
 - screaming archi + hexagon
 - Compute estimated power, speed
 - For a ride, scatter, one point per 100m segment. Slope vs speed