chore(docs): clean up and add new content (#15003)

* wip: Install

* wip: sharing

* wip: features

* wip: features

* wip: tags and folder view

* update links

* fix: broken reference to page sections

* pr feedback

* Update docs/docs/overview/comparison.md

Co-authored-by: Daniel Dietzler <36593685+danieldietzler@users.noreply.github.com>

* webp

* webp is glory

* webp is glory

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Co-authored-by: Daniel Dietzler <36593685+danieldietzler@users.noreply.github.com>

docs/docs/overview/comparison.md

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+---
+sidebar_position: 2
+---
+
+# Comparison
+
+If you're new here and came from other asset self-hosting alternatives you might want to look at a comparison between Immich and your current solution.
+Here you can see a [comparison between the various OpenSource Photo Libraries](https://meichthys.github.io/foss_photo_libraries/) including Immich.