feat: rename to paperspec and add the website

- Rename manuspec to paperspec everywhere outside pixi.toml: prose, the
  tools, provenance tool names and the fixture key derivations, so every
  fixture and vector is rebuilt.
- Move the namespace addresses under the site, mirroring the repository:
  schema $id https://paperspec.scient.ing/schemas/<file>, the JSON-LD
  context https://paperspec.scient.ing/context/scienting-1.jsonld, and
  term IRIs https://paperspec.scient.ing/vocab#<term>. Format
  identifiers (scienting-*) and URNs (urn:scienting:) are unchanged.
- tools/site.py (standard library only) builds _site/: every file of the
  repository at its own path, each Markdown file rendered as a page with
  sidebar navigation, heading anchors matching the forge's, folder
  listings, a vocabulary page for the context's IRIs, a heading search
  and a 404 page; light and dark themes.
- check.py builds the site and checks that every Markdown file has a
  page, every internal link and fragment resolves, no Markdown is left
  unrendered, and every $id, the context address and the vocabulary IRIs
  are files of the site.
- deploy/: a Caddyfile with the media types and CORS the data needs, and
  a guide; .gitea/workflows/site.yml builds on main and publishes with
  rsync when the SITE_* secrets are set.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -1,4 +1,4 @@
-# manuspec
+# paperspec
 
 **The data formats for storing a team's scientific papers once, correcting them once, addressing them down to the sentence, and keeping them.**
 
@@ -6,7 +6,7 @@ This page is for three readers.
 A newcomer should read straight through; each term is explained where it first appears.
 The tables below point an implementer, who will write a reader, writer, converter or checker, to the chapters, test vectors and fixtures that define exact behavior.
 The sections on status and on differences give an expert in the neighboring standards the version, the maturity of each format and the comparison.
-The repository is at <https://git.scient.ing/infra/manuspec>.
+The documentation and every file of the specification are published at <https://paperspec.scient.ing>, and the repository is at <https://git.scient.ing/infra/paperspec>.
 
 A research team usually cares about a few dozen papers it understands completely, not the world's literature.
 Those papers deserve better than a folder of PDFs.
@@ -62,6 +62,7 @@ The address grammar is in [spec/06 §6.1](spec/06-anchors.md#61-addresses), and
 | [fixtures/](fixtures/README.md) | Example packages and records, deliberately broken packages, and the test keys that signed them. |
 | [tools/](tools/README.md) | The programs that build and check everything above. |
 | [docs/](docs/README.md) | Guides for people getting to know the project. |
+| [deploy/](deploy/README.md) | How the website at <https://paperspec.scient.ing> is built and served. |
 
 ## Try it
 
@@ -77,7 +78,8 @@ It recomputes every test vector, and it rebuilds everything and compares it byte
 Last, it loads every package into SQLite and back, and checks the prose and the links.
 Pixi lints the Markdown first.
 The run ends with `All checks pass.`
-`pixi task list` shows the other tasks: `quick`, `build`, `lint`, `load` and `validate`.
+`pixi task list` shows the other tasks: `quick`, `build`, `lint`, `load`, `validate` and `stress`.
+`pixi run python tools/site.py` builds the website into `_site/` ([deploy/](deploy/README.md)).
 
 The tools need Python 3.14 and two packages, `jsonschema` and `cryptography`, which pixi installs along with markdownlint for the Markdown.
 Without pixi, install those two with pip and run `python3 tools/check.py`.
@@ -93,7 +95,7 @@ pixi run load --sqlite lab.db fixtures/packages/hale2026harmonic
 Every format is named `scienting-<name>/<major>`, such as `scienting-doc/1` or `scienting-anchor/1`.
 The `scienting-` prefix is the formats' namespace, a separate matter from the repository's name.
 A format is named after what it holds, never after a product or a repository, and products can be renamed without touching data.
-Schemas use the identifier base `https://scient.ing/ns/schemas/`.
+Schemas use the identifier base `https://paperspec.scient.ing/schemas/`.
 [registry/formats.json](registry/formats.json) lists every format with its media type, schema, status and chapter.
 
 ## Status and limits