TChem: update citations. (#119)

* TChem: update citations.

* add zenodo badge. add spacing

---------

Co-authored-by: Jeffrey Curtis <[email protected]>

Author: odiazib

CITATION.cff

@@ -1,15 +1,23 @@
 cff-version: 1.2.0
-message: "If you use this software, please cite it as below."
+message: "If you use this software, please cite it using the following metadata."
+title: "TChem-atm version 2.0.0"
 authors:
-  - family-names: Safta
-    given-names: Cosmin  
-  - family-names: Diaz-Ibarra
-    given-names: Oscar H. 
-  - family-names: Schmidt 
-    given-names: Michael 
-title: "TChem-atm"
-version: 1.0.0
+  - family-names: "Diaz-Ibarra"
+    given-names: "Oscar H."
+  - family-names: "Frederick"
+    given-names: "Samuel"
+  - family-names: "Curtis"
+    given-names: "Jeffrey"
+  - family-names: "D'Aquino"
+    given-names: "Zachary"
+  - family-names: "Safta"
+    given-names: "Cosmin"
+  - family-names: "West"
+    given-names: "Matthew"
+  - family-names: "Riemer"
+    given-names: "Nicole"
+version: "2.0.0"
 identifiers:
   - type: doi
-    value: https://doi.org/10.11578/dc.20240925.6
-date-released: 2024-06-07
+    value: https://doi.org/10.5281/zenodo.17058144
+date-released: 2025-09-01

CITATIONS.bib

@@ -1,3 +1,26 @@
+@software{diaz_ibarra_2025_17058144,
+  author       = {Diaz-Ibarra, Oscar H. and
+                  Frederick, Samuel and
+                  Curtis, Jeffrey and
+                  D'Aquino, Zachary and
+                  Safta, Cosmin and
+                  West, Matthew and
+                  Riemer, Nicole},
+  title        = {TChem-atm version 2.0.0},
+  month        = sep,
+  year         = 2025,
+  publisher    = {Zenodo},
+  version      = {2.0.0},
+  doi          = {10.5281/zenodo.17058144},
+  url          = {https://doi.org/10.5281/zenodo.17058144},
+  swhid        = {swh:1:dir:cc97f85bfd89e068e2d94e0bd1d934f99ef515bd
+                   ;origin=https://doi.org/10.5281/zenodo.17058143;vi
+                   sit=swh:1:snp:6031c903d9a559e5372e46d9801d9b378d5c
+                   b12a;anchor=swh:1:rel:5d8e35ae9686eb9f2ef7b61a25f6
+                   44a3a9431fc8;path=/
+                  },
+}
+
 @misc{osti_2472634,
 title = {TChem-atm v1.0, Version 1.0},
 author = {Safta, Cosmin and Diaz-Ibarra, Oscar and Schmidt, Michael and USDOE},

README.md

@@ -3,6 +3,7 @@
 [![Latest version](https://img.shields.io/github/v/release/PCLAeroParams/TChem-atm.svg?sort=semver)](https://github.com/PCLAeroParams/TChem-atm/releases)
 [![Github Actions Status](https://github.com/PCLAeroParams/TChem-atm/actions/workflows/auto_test.yaml/badge.svg?branch=main)](https://github.com/PCLAeroParams/TChem-atm/actions)
 [![GitHub Pages](https://img.shields.io/badge/GitHub%20Pages-121013?logo=github&logoColor=white)](https://PCLAeroParams.github.io/TChem-atm/)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.17058143.svg)](https://doi.org/10.5281/zenodo.17058143)
 [![License](https://img.shields.io/badge/License-BSD_2--Clause-green.svg)](https://github.com/PCLAeroParams/TChem-atm/blob/main/LICENSE)
 
 ## Installation 
@@ -11,6 +12,7 @@ The [installation](docs/installation.md) guide demonstrates how to obtain, build
 
 ## Citations
 * [TChem-atm ](https://www.osti.gov/biblio/2472634)
+
 ```bibtex
 @misc{osti_2472634,
 title = {TChem-atm v1.0, Version 1.0},
@@ -41,6 +43,7 @@ toolkit for complex kinetic mechanisms.](https://www.sciencedirect.com/science/a
 ```
 
 * ["Benchmarking TChem for Potential Incorporation into E3SM as a Replacement Chemical Kinetics Solver"](sand_report/QTI_tchemV1.pdf)
+
 ```bibtex
 @techreport{Diaz-Ibarra:2024:tchem,
   author      = {Diaz-Ibarra, Oscar and Schmidt, Michael J.  and Safta, Cosmin },