Add base files for new Jekyll site setup

Introduced initial setup for a Jekyll-based site, including configurations, layouts, assets, and styles. Added custom 404 page, favicon assets, SCSS themes, fonts, and a blog post template to establish the foundation for the site.

_config.yml

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+title: elyday.dev
+description: >-
+  Some dude in the internet.
+lang: en-US
+timezone: Europe/Berlin
+image: assets/img/ogp.png
+mode: dark # default theme "dark" | "light"
+
+# Profile settings
+author:
+  name: elyday
+  bio: >-
+    Some dude in the internet. Interested in gaming and software backend engineering (mainly using php as programming language).
+  username: elyday
+  github: elyday
+  email: contact@elyday.dev
+  avatar: /assets/img/avatar.jpg
+
+# URL settings
+url: "https://klise.now.sh" #
+baseurl:
+permalink: /:title/
+google_analytics: # leave it blank if not wish
+fb_appid:
+
+# Collection setting
+collections:
+  posts:
+    output: true
+
+# Markdown settings
+markdown: kramdown
+highlighter: rouge
+kramdown:
+  syntax_highlighter: rouge
+
+# Default front matter
+defaults:
+  - scope:
+      path: ""
+    values:
+      layout: post
+      comments: false
+
+# Jekyll Compose default front matter
+jekyll_compose:
+  post_default_front_matter:
+    modified:
+    tags: [ ]
+    description:
+  draft_default_front_matter:
+    modified:
+    tags: [ ]
+    description:
+
+# Homepage limit posts
+number_of_posts: 5
+
+# Build settings
+# theme: klise
+sass:
+  style: compressed
+
+include:
+  - _redirects
+  - .htaccess
+
+exclude:
+  - Gemfile
+  - Gemfile.lock
+  - README.md
+  - node_modules
+  - lighthouse.png
+
+# Plugins
+plugins:
+  - jekyll-feed
+  - jekyll-sitemap
+  - jekyll-postfiles