Add initial CITATION.cff file (#45)

* Fix typos in README

* fix more typos

* add CITATION.cff file

Author: hegner

CITATION.cff

@@ -0,0 +1,28 @@
+cff-version: 1.2.0
+title: JetReconstruction.jl
+message: >-
+  If you use this software, please cite it using the
+  metadata from this file.
+type: software
+authors:
+  - given-names: Graeme Andrew
+    family-names: Stewart
+    email: [email protected]
+    affiliation: CERN
+    orcid: 'https://orcid.org/0000-0003-0182-7088'
+  - given-names: Atell
+    family-names: Krasnopolski
+    email: [email protected]
+    orcid: 'https://orcid.org/0009-0009-9336-0219'
+  - given-names: Philippe
+    family-names: Gras
+    email: [email protected]
+    orcid: 'https://orcid.org/0000-0002-3932-5967'
+  - given-names: Benedikt
+    family-names: Hegner
+    email: [email protected]
+    affiliation: CERN
+    orcid: 'https://orcid.org/0009-0009-2020-1620'
+repository-code: 'https://github.com/JuliaHEP/JetReconstruction.jl'
+abstract: Jet reconstruction (reclustering) with Julia
+license: MIT