Lumenwright 0.2.0

Added

• HQ mode draws the game's own sky (HqSkyModel::Game, --sky game), lit as the 1.21.11
  client lights the tick, by the method Delvewright's engine lights its Chunky scenes with
  (docs/research/game-sky.md): the sun casts no light; the sky casts the colour the
  client's lightmap gives a cell open to it, from the jar's visual/sky_light_factor and
  visual/sky_light_color (now in EnvironmentState), with the directions of the client's
  sky; the lens sees the client's sky as quick mode draws it, its disc, fog, sunrise glow,
  sun, moon and stars. The host draws the sky into two equirectangular maps that every
  backend reads (Params::sky_map; integrator::sky_lens, sky_light). A jar without
  environment attributes is refused under it.
• The game look's emitter intensity, GAME_EMITTER_INTENSITY = 137.9628 (13 × 10.6125),
  authored by Lumenwright: fitted so that the Treehouse Camp's lantern-lit pixels at dusk
  read as Delvewright's engine's Chunky render of the frame does. --emitter-intensity
  takes any value over it.
• --tonemap filmic-mid-grey (Tonemap::FilmicMidGrey, post::game_tone_curve): Chunky's
  Hable curve read 1.463761 times brighter, so linear 0.18 shows at 0.18^(1/2.2) as the
  game's transfer shows it.

Changed

• HQ mode's default sky goes by the time of day (SkyLook::ByTime, --sky auto): Chunky's
  Preetham sky and sun on the client's day plateau (ticks 730 to 11270, where
  visual/sky_light_factor is 1), the game's sky on the night plateau, and between them one
  render mixing the two by where the factor stands between its night and day values, with no
  jump from one tick to the next. --sky chunky and --sky game force either look.
  HqSkyModel is a struct (look, render_distance, sun_intensity, sky_intensity);
  Sky::Vanilla carries it in place of sun_intensity and sky_intensity.
  --sun-intensity and --sky-intensity are refused only under --sky game.
• HqOptions::tonemap and emitter_intensity are Options: unstated, each look takes its
  own (gamma and 13 for Chunky's, filmic-mid-grey and GAME_EMITTER_INTENSITY for the
  game's), mixed by the day weight.
• Params is 26 vec4s (416 bytes): sky_map gives the sizes of the sky's maps. A sun of
  colour 0 draws no next-event sample.
• Tonemap::Filmic is evaluated as Chunky's processPixel evaluates it (the parameter
  products in float, the rest in double) through the one HableCurve.
• The HQ timing stage sky cache is sky.
• lumenwright-cli is published to crates.io with the other two crates (cargo install lumenwright-cli); the release workflow publishes lumenwright-kernel, lumenwright and
  lumenwright-cli in that order and refuses unless all three are absent at the version.
• lumenwright-kernel declares rust-version 1.88, the first release it builds on (its if let
  chains); 0.1.0 declared 1.85, on which it does not compile.