add locale date scalar (graphql#20)

* add locale date scalar

* ignore github username for spelling

* fix build problems

* fix build problems

* Update scalars/contributed/andimarek/local-date.md

Co-authored-by: Ivan Maximov <[email protected]>

* Update scalars/contributed/andimarek/local-date.md

Co-authored-by: Ivan Maximov <[email protected]>

* Update scalars/contributed/andimarek/local-date.md

Co-authored-by: Ivan Maximov <[email protected]>

* improve  examples

* Update scalars/contributed/andimarek/local-date.md

Co-authored-by: dondonz <[email protected]>

* Update scalars/contributed/andimarek/local-date.md

Co-authored-by: dondonz <[email protected]>

Co-authored-by: Ivan Maximov <[email protected]>
Co-authored-by: dondonz <[email protected]>

Author: 3 people

scalars/contributed/andimarek/local-date.md

@@ -0,0 +1,49 @@
+<!-- cspell:ignore andimarek -->
+
+# LocalDate — GraphQL Custom Scalar
+
+"Author - andimarek"
+
+"Date - 2023-01-18"
+
+This is a String-based Scalar.
+
+**License and Copyright**
+
+Copyright © GraphQL contributors. This specification is licensed under
+[OWFa 1.0](https://www.openwebfoundation.org/the-agreements/the-owf-1-0-agreements-granted-claims/owfa-1-0).
+
+# Overview
+
+This scalar represents a date without a time-zone in the
+[ISO-8601](https://en.wikipedia.org/wiki/ISO_8601) calendar system.
+
+The pattern is "YYYY-MM-DD" with "YYYY" representing the year, "MM" the month
+and "DD" the day.
+
+Valid examples are "1983-10-20" or "2023-04-01". An invalid example would be
+"2011-13-10" because there isn't a 13th month in a year.
+
+The prefix "Local" comes from the fact that without a time-zone it is not a
+specific point in time, but rather expresses a "local point of view". A popular
+use case for using this scalar are birthdays for example, which are normally not
+stored with a specific timezone.
+
+Because this scalar depends on the ISO-8601 calendar it is not recommended to
+use for dates before the year 1582.
+
+# Name
+
+The recommended name is "LocalDate".
+
+# Result spec
+
+Every result must follow the pattern "YYYY-MM-DD" as described above.
+
+# Input spec
+
+Every input must follow the pattern "YYYY-MM-DD" as described above.
+
+# References
+
+[ISO-8601](https://en.wikipedia.org/wiki/ISO_8601)