Enhance .zenodo.json metadata (quantumlib#7017)

* Enhance .zenodo.json metadata

This adds several more fields and values. The keys used here follow
the description at https://developers.zenodo.org/#representation with
the additional constraint that I limited them to the subset in the
["legacy deposit JSON
Schema"](https://github.com/zenodo/zenodo/blob/master/zenodo/modules/deposit/jsonschemas/deposits/records/legacyrecord.json)
that is described in the (Zenodo documentation section about
GitHub](https://developers.zenodo.org/#github). Hopefully this will
ensure maximum compatibility with the GitHub Zenodo webhook.

* Added a couple more keys and values

Added another `related_identifiers` value, indicating that the current
record `isPartOf` the Cirq parent DOI record on Zenodo.

Also added a `language` field value. This field is not present in the
["legacy deposit JSON
Schema"](https://github.com/zenodo/zenodo/blob/master/zenodo/modules/deposit/jsonschemas/deposits/records/legacyrecord.json)
schema that I used at first. However, that schema doesn't appear to be
up to date with what Zenodo accepts today (which is perhaps
unsurprising, given that it's named "legacyrecord" ...). Searching the
web, I found an [unofficial
schema](https://github.com/zenodraft/metadata-schema-zenodo/blob/main/schema.json)
created last year by a former colleague who works in the area of
software & data preservation and archiving. This schema is more
complete and includes the `language` field. I used that schema to
validate this updated `.zenodo.json` file.

* Update .zenodo.json

Co-authored-by: Pavol Juhas <[email protected]>

---------

Co-authored-by: Pavol Juhas <[email protected]>

Author: mhucka

.zenodo.json

@@ -1,13 +1,75 @@
 {
-    "description": "Cirq is a Python library for writing, manipulating, and optimizing quantum circuits and running them against quantum computers and simulators.",
-    "license": "Apache-2.0",
-    "title": "Cirq",
-    "upload_type": "software",
-    "creators": [
-        {
-            "name": "Cirq Developers"
-        }
-    ],
-    "access_right": "open",
-    "notes": "See full list of authors on GitHub: https://github.com/quantumlib/Cirq/graphs/contributors"
+  "title": "Cirq",
+  "description": "Cirq is a Python library for writing, manipulating, and optimizing quantum circuits and running them against quantum computers and simulators.",
+  "license": "Apache-2.0",
+  "access_right": "open",
+  "upload_type": "software",
+  "notes": "The full list of authors can be found on GitHub at the URL https://github.com/quantumlib/Cirq/graphs/contributors",
+  "creators": [
+    {
+      "name": "Cirq Developers"
+    }
+  ],
+  "related_identifiers": [
+    {
+      "identifier": "https://github.com/quantumlib/Cirq",
+      "relation": "isDerivedFrom",
+      "scheme": "url"
+    },
+    {
+      "identifier": "https://quantumai.google/cirq",
+      "relation": "isDocumentedBy",
+      "scheme": "url"
+    },
+    {
+      "identifier": "https://github.com/quantumlib/Cirq/blob/main/README.md",
+      "relation": "isDocumentedBy",
+      "scheme": "url"
+    },
+    {
+      "identifier": "https://pypi.org/project/cirq",
+      "relation": "isSupplementedBy",
+      "scheme": "url"
+    },
+    {
+      "identifier": "10.5281/zenodo.4062499",
+      "relation": "isPartOf",
+      "scheme": "doi"
+    }
+  ],
+  "keywords": [
+    "algorithms",
+    "API",
+    "application programming interface",
+    "Cirq",
+    "NISQ",
+    "noisy intermediate-scale quantum",
+    "open-source software",
+    "physics",
+    "Python",
+    "quantum algorithms",
+    "quantum circuit simulator",
+    "quantum circuit",
+    "quantum computer simulator",
+    "quantum computing",
+    "quantum development kit",
+    "quantum gate",
+    "quantum hardware modeling",
+    "quantum information science",
+    "quantum information",
+    "quantum programming language",
+    "quantum programming",
+    "quantum simulation",
+    "quantum state",
+    "quantum system",
+    "quantum theory",
+    "quantum",
+    "qubit",
+    "science",
+    "SDK",
+    "simulation",
+    "software development toolkit",
+    "software"
+  ],
+  "language": "eng"
 }