chore: add icons to documentation metadata for improved visual representation

surfsense_web/content/docs/connectors/meta.json

@@ -1,5 +1,6 @@
 {
 	"title": "Connectors",
+	"icon": "Cable",
 	"pages": [
 		"google-drive",
 		"gmail",

surfsense_web/content/docs/docker-installation.mdx

@@ -1,6 +1,7 @@
 ---
 title: Docker Installation
 description: Setting up SurfSense using Docker
+icon: Container
 ---
 
 

surfsense_web/content/docs/how-to/meta.json

@@ -1,5 +1,6 @@
 {
 	"title": "How to",
+	"icon": "BookOpen",
 	"pages": ["electric-sql", "realtime-collaboration"],
 	"defaultOpen": false
 }

surfsense_web/content/docs/index.mdx

@@ -1,6 +1,7 @@
 ---
 title: Prerequisites
 description: Required setup's before setting up SurfSense
+icon: ClipboardCheck
 ---
 
 

surfsense_web/content/docs/installation.mdx

@@ -1,6 +1,7 @@
 ---
 title: Installation
 description: Current ways to use SurfSense
+icon: Download
 ---
 
 # Installing SurfSense

surfsense_web/content/docs/manual-installation.mdx

@@ -1,6 +1,7 @@
 ---
 title: Manual Installation
 description: Setting up SurfSense manually for customized deployments (Preferred)
+icon: Wrench
 ---
 
 # Manual Installation (Preferred)

surfsense_web/content/docs/testing.mdx

@@ -1,6 +1,7 @@
 ---
 title: Testing
 description: Running and writing tests for SurfSense
+icon: FlaskConical
 ---
 
 SurfSense uses [pytest](https://docs.pytest.org/) with two test layers: **unit** tests (no database) and **integration** tests (require PostgreSQL + pgvector). Tests are self-bootstrapping — they configure the test database, register a user, and clean up automatically.