chore: use global authors file

When assigning author to the blog posts, do not specify the author in an
exhausting way in each post, just use the global file with a nicknames
and all info specified in one place.

Signed-off-by: Matej Focko <me@mfocko.xyz>

blog/aoc-2022/00-intro.md

@@ -3,11 +3,7 @@ title: Advent of Code '22 in Rust
 description: Preparing for Advent of Code '22.
 date: 2022-12-14T21:45
 slug: aoc-2022/intro
-authors:
-- name: Matej Focko
-  title: "a.k.a. @mf"
-  url: https://gitlab.com/mfocko
-  image_url: https://github.com/mfocko.png
+authors: mf
 tags:
 - aoc-2022
 - advent-of-code

blog/aoc-2022/01-week-1.md

@@ -3,11 +3,7 @@ title: 1st week of Advent of Code '22 in Rust
 description: Surviving first week in Rust.
 date: 2022-12-15T01:15
 slug: aoc-2022/1st-week
-authors:
-- name: Matej Focko
-  title: "a.k.a. @mf"
-  url: https://gitlab.com/mfocko
-  image_url: https://github.com/mfocko.png
+authors: mf
 tags:
 - aoc-2022
 - advent-of-code

blog/aoc-2022/02-week-2.md

@@ -3,11 +3,7 @@ title: 2nd week of Advent of Code '22 in Rust
 description: Surviving second week in Rust.
 date: 2022-12-25T23:15
 slug: aoc-2022/2nd-week
-authors:
-- name: Matej Focko
-  title: "a.k.a. @mf"
-  url: https://gitlab.com/mfocko
-  image_url: https://github.com/mfocko.png
+authors: mf
 tags:
 - aoc-2022
 - advent-of-code

blog/authors.yml

@@ -0,0 +1,5 @@
+mf:
+  name: Matej Focko
+  title: "a.k.a. @mf"
+  url: https://gitlab.com/mfocko
+  image_url: https://github.com/mfocko.png

blog/leetcode/sort-matrix-diagonally.md

@@ -3,11 +3,7 @@ title: Sort the matrix diagonally
 description: Compiler assisted development.
 date: 2023-03-04T23:15
 slug: leetcode/sort-diagonally
-authors:
-- name: Matej Focko
-  title: "a.k.a. @mf"
-  url: https://gitlab.com/mfocko
-  image_url: https://github.com/mfocko.png
+authors: mf
 tags:
 - cpp
 - leetcode