feat(schema): Only include author schema from pubmatter spec

src/schemas.typ

@@ -1,2 +1,2 @@
-#import "schemas/pubmatter.typ": author, affiliation, pubmatter, abstracts
+#import "schemas/author.typ": author
 #import "schemas/enumerations.typ": papersize

src/schemas/author.typ

@@ -0,0 +1,40 @@
+#import "../types.typ" as z;
+#import "../coercions.typ" as coerce;
+
+#let author = z.dictionary(
+  aliases: (
+    "affiliation": "affiliations",
+    "website": "url",
+    "homepage": "url",
+    "ORCID": "orcid",
+    "equal_contributor": "equal-contributor",
+    "equalContributor": "equal-contributor",
+  ),
+  (
+    name: z.string(),
+    url: z.string(optional: true),
+    phone: z.string(optional: true),
+    fax: z.string(optional: true),
+    orcid: z.string(optional: true),
+    note: z.string(optional: true),
+    email: z.email(optional: true),
+    corresponding: z.boolean(optional: true),
+    equal-contributor: z.boolean(optional: true),
+    deceased: z.boolean(optional: true),
+    roles: z.array(z.string(), pre-transform: coerce.array),
+    affiliations: z.array(
+      z.either(
+        z.string(),
+        z.number(),
+      ),
+      pre-transform: coerce.array,
+    ),
+  ),
+  pre-transform: coerce.dictionary(it => (name: it)),
+  post-transform: (self, it) => {
+    if (it.at("email", default: none) != none and it.corresponding == none) {
+      it.insert("corresponding", true)
+    }
+    return it
+  },
+)