docs: 📝 update CITATION.cff

Update citation metadata and improve `CITATION.cff`

Enhances the `CITATION.cff` file by updating the citation message, adding
contact details, keywords, license, repository links, and software type. Also
refines author details and ORCID links for improved clarity and attribution.

Expands `.cspell.json` dictionary with new words to accommodate updated metadata
and ensure proper spell checking.

Author: djmaxus

.cspell.json

@@ -2,8 +2,16 @@
     "version": "0.2",
     "language": "en,en-GB",
     "words": [
+        "djmaxus",
+        "Elizarev",
         "Krevor",
-        "PFLOTRAN"
+        "Maksim",
+        "Muggeridge",
+        "orcid",
+        "PFLOTRAN",
+        "Senyou",
+        "Wenck",
+        "Zenodo"
     ],
     "flagWords": [],
     "ignorePaths": [

CITATION.cff

@@ -1,15 +1,19 @@
 # https://github.com/citation-file-format/citation-file-format
 cff-version: 1.2.0
 title: "StrataTrapper upscaling toolkit"
-message: "If you use this software, please cite it using these metadata."
+message: >-
+  If you use this software,
+  please put the copyright NOTICE.txt in your developments
+  and cite using CITATION.cff provided in the repository
+  or generated by Zenodo
 authors:
   - family-names: Elizarev
     given-names: Maksim
     alias: djmaxus
     orcid: "https://orcid.org/0000-0002-5279-2877"
     website: "https://djmaxus.dev"
   - family-names: Jackson
-    given-names: "Samuel J"
+    given-names: Samuel J
   - family-names: An
     given-names: Senyou
   - family-names: Wenck
@@ -19,3 +23,23 @@ authors:
   - family-names: Krevor
     given-names: Samuel
 doi: "10.5281/zenodo.15438164"
+contact:
+  - family-names: Elizarev
+    given-names: Maksim
+  - family-names: Krevor
+    given-names: Samuel
+keywords:
+  - matlab
+  - co2
+  - upscaling
+  - carbon-dioxide
+  - heterogeneity
+  - reservoir-simulation
+  - porous-media-flow
+  - pflotran
+  - capillary-pressure
+  - co2-storage
+license: BSD-3-Clause
+repository-code: "https://github.com/ImperialCollegeLondon/StrataTrapper"
+type: software
+url: "https://imperialcollegelondon.github.io/StrataTrapper/"