feat(docs): Added a citation file

Author: T145

CITATION.cff

@@ -0,0 +1,22 @@
+cff-version: 1.2.0
+title: Black Mirror
+message: >-
+  If you use this software or dataset, please cite it using
+  the metadata from this file.
+type: dataset
+authors:
+  - given-names: T145
+    affiliation: Owner
+repository-code: 'https://github.com/T145/black-mirror'
+repository-artifact: 'https://github.com/T145/black-mirror/releases/tag/latest'
+abstract: >-
+  Blacklists and whitelists built by open code to promote
+  security, safety, and sanity across the internet!
+keywords:
+  - blacklist
+  - whitelist
+  - privacy
+  - dns
+  - blocklist
+  - allowlist
+license: AGPL-3.0