Inklet 4.10.0

Found porting a project that kept its house style, and several workarounds,
in style modules outside inklet.

Added

• inklet.suite(...) / Suite: one immutable house style for a figure set.
  It holds the fonts, a type scale in pt by role, line-weight tiers, the marker
  style, named palettes and ramps, the panel-letter style, text rules, named
  widths, export settings and a lint profile. with house: makes it the
  active theme. line(), mark(), marker(), axes(), label(),
  end_labels(), mosaic(), letter(), figure() and document() draw in
  it. text_color() deepens a series colour to the label contrast and keeps
  its hue. save() writes the export formats and lints them. build() builds
  a set, skips figures whose fingerprint is unchanged, isolates sys.modules
  and sys.path per figure, and reports the house rules each figure breaks.
  current_suite() returns the active suite. Guide: docs/house-styles.md;
  example: examples/house_style.py.
• lint(house=HouseRules(...)) adds five codes, silent without house=:
  • STROKE_TIER: a stroke in a plot panel that is not one of the house weights.
  • MARKER_OUTLINE: a filled marker with an outline.
  • MUTED_TEXT: grey text, by OKLab chroma and lightness or by listed colours.
  • BOLD_TEXT: bold that is not a panel letter.
  • KEY_IN_PANEL: a key that is part of a plot panel, over the data or beside it.
• save(..., write="changed") leaves a set of files untouched, timestamps
  included, when no file's bytes would change. save() returns
  {path: written}, keyed by each path as str(Path(path)); it returned
  None before, so a bare fig.save(...) as the last line of a notebook cell
  now displays that mapping.
• to_svg(ids="document") (and save(ids=...)) numbers element ids per file,
  so a figure's SVG no longer depends on what else was built in the process.
• inklet.typeset.fonts.public_family() and inklet.layout.mosaic.header_text().
• panel_mosaic(..., header_bounds="ink") keeps the header placement of
  4.9 (see Visible changes).

Visible changes

• panel_mosaic sets panel letters and titles on one baseline with one
  header height. Existing figures change: measured by their own ink, a b
  sat 0.5 mm below an a at 8 pt (a j 1.1 mm), and its panel started
  0.5 mm lower. Panels lettered with x-height letters (a, c, e, ...) now
  move down by about 0.5 mm to match, a panel lettered j moves up, and
  ascender letters (b, d, f, ...) stay where they were. A multi-line title
  reserves all of its lines. header_bounds="ink" keeps the 4.9 placement.
  Mosaic letters are now panel letters (LETTER_KIND) in either mode, so
  lint checks them against letter limits (max_letter_pt) rather than as
  body text.

Changed

• to_pdf(text="embed") embeds CFF-flavoured OpenType faces (.otf with
  PostScript outlines, such as Nimbus Sans or Source Sans) as live TrueType
  text: CIDFontType2 with a /FontFile2 subset whose outlines are converted
  to quadratics within 1/1000 em. Before, their text was outlined with a
  FontEmbeddingWarning. Only CFF2 and bitmap-only faces are still outlined.
• save() renders every file, then writes each through a temporary file and
  an atomic rename. All files from one call share one modification time, so
  "newest of pdf/svg/png" no longer picks the PNG, which is drawn last. A
  format that fails to render leaves every file as it was. An existing file
  keeps its permission bits; a symbolic link is followed and the file it
  points to is replaced. Writing needs permission to create a file in the
  target directory.
• to_pdf(text="embed") outlines a CFF face whose outlines do not convert,
  with a FontEmbeddingWarning, instead of failing the export.
• TINY_TEXT and LARGE_TEXT accept sizes within 0.01 pt of the limit.
  Before, 8 * 0.3528 mm (8.0005 pt) was reported as above an 8 pt maximum.

Fixed

• SVG output never contains a font-file path. A theme that names a face by
  path ("/fonts/X.ttf, X, sans-serif") wrote that path into every
  font-family. The family name in the file is written instead.