Template kit 1.5.0: form placements

Added

• The form section: a placement (Home and About) that names a form the organisation built
  in Forms through the Pages editor. The section stores formId, formInstanceId and
  formSlug; the form island renders the instance the slug addresses with the respondent
  fields, the questions, the privacy line and the submit. The island's styling API is the
  renderer's p60-form-* classes. The validator accepts the section or the island for the
  forms capability; the preview renders the form fixture only for a matching formSlug.
• The starter ships sections/form.liquid and declares the section and the island.
• Content bounds record the 200-character plain-text biography limit on People sections.

Fixed

• The starter renders complete biographies with line breaks and wrapping instead of italics.
• Authored output escaping replaces NUL characters so a stored control character cannot
  reach a rendered page.

Compatibility and release

Additive: the section catalogue, manifest schema (sectionPresentation and
sectionHeadingAlignment accept form, at most 17 entries) and the form island entry grow;
nothing existing changes. Templates that do not ship sections/form.liquid are unaffected: the
editor marks a placed form section not visible and the public page skips it. Publish through
the mirror's GitHub Release workflow after the matching platform release
(multi-tenant-services #329) is live.