docs: improve overall documentation

.github/readme/partials/documentation/setup.md

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+## 🦮 Setup
+
+There are several ways to setup metrics, each having its advantages and disadvantages:
+
+* [⚙️ Using GitHub Action on a profile repository *(~10 min)*](/.github/readme/partials/setup/action.md)
+  * ✔️ All features
+  * ✔️ High availability (no downtimes)
+  * ➖ Configuration can be a bit time-consuming
+* [💕 Using the shared instance *(~1 min)*](/.github/readme/partials/setup/shared.md)
+  * ✔️ Easily configurable and previewable
+  * ➖ Limited features *(compute-intensive features are disabled)*
+* 🐳 Using command line with docker *(~5 min)* *(documentation not available yet)*
+  * ✔️ Suited for one-time rendering
+* [🏗️ Deploying your own web instance *(~20 min)*](/.github/readme/partials/setup/web.md)
+  * ➖ Mostly intended for development, or to create another shared instance
+
+Additional resources for setup:
+* [🏦 Configuring metrics for organizations](/.github/readme/partials/organizations.md)
+* [🧰 Template/Plugin compatibility matrix](/.github/readme/partials/compatibility.md)