Feat/add simple icons support

[deimosfr]

Changes

Adding simple icons to lotusdocs

Below you'll find a checklist. For each item on the list, check one option and delete the other.

Note 1: if you want to see a result with material and simple icons, you can look at: https://wiki.deimos.fr
Note 2: some parts could be factorized but as I don't know in which direction this project wants to evolves, I kept it simple

Dark mode

• The UI has been tested both in dark and light mode
• This PR does not change the UI

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[homelab-alpha]

If this pull request (PR) is merged, the Hugo front matter documentation will require updates to reflect the new icon handling features.

Adding Icons to Posts or Index files

Note

If the icontype field is not explicitly specified, Google Icons will be used by default.

To include Simple Icons in your Hugo project, add the following fields to the front matter of your content files (such as archetypes/default.md, post.md, or _index.md):

Example for a Post with Simple Icons

---
title: "Post with Simple Icons"
description: "Incorporate Simple Icons into your post.md"
url: ""
aliases: ""
icon: "git"
icontype: "simple"
---

Example for an Index Page with Simple Icons

---
title: "Index with Simple Icons"
description: "Incorporate Simple Icons into your _index.md file"
url: ""
icon: "git"
icontype: "simple"
weight: 100
---

If you prefer Google Icons, you can easily switch by modifying the front matter like this:

Example for a Post with Google Icons

To use Google Icons, adjust the front matter as shown below:

---
title: "Post with Google Icons"
description: "Incorporate Google Icons into your post.md"
url: ""
aliases: ""
icon: "Commit"
---

Example for an Index Page with Google Icons

---
title: "Index with Google Icons"
description: "Incorporate Google Icons into your _index.md file"
url: ""
icon: "Commit"
weight: 100
---