Many changes and adding examples

- Fix use of sizes (maybe set exception for 13pt?)
- Prepare keys for margins
- Show example of bibfile modification on the go
- Show how to use `\xkvview` to check defined keys

York-Thesis/Bibfiles/firstbib.bib

@@ -2,5 +2,25 @@
   author = {Donald E. Knuth},
   year = {1986},
   title = {The {\TeX} Book},
-  publisher = {Addison-Wesley Professional}
-}
+  publisher = {Addison-Wesley Professional},
+  arXivId = {2307.11596}
+},
+@article{FalseGGJ,
+  author        = {Victoria Gould and Ambroise Grau and Marianne Johnson},
+  journal       = {Trying},
+  title         = {The structure of {E}nd({E}nd($\mathcal{T}_n$))},
+  year          = {2024},
+  month         = jul,
+  arXivId        = {2307.11596}
+},
+@article{GGJ23,
+  author        = {Victoria Gould and Ambroise Grau and Marianne Johnson},
+  journal       = {Submitted},
+  title         = {The structure of {E}nd($\mathcal{T}_n$)},
+  year          = {2023},
+  month         = jul,
+  archiveprefix = {arXiv},
+  creationdate  = {2023-08-05T16:13:02},
+  eprint        = {2307.11596}
+}
+