Add degoog CT/install/metadata and update docs

Introduce degoog support: add ct/degoog.sh (container orchestration and update handler), install/degoog-install.sh (in-container install using Bun, deploy prebuilt release, create systemd service on port 4444) and json/degoog.json (app metadata and default resources). ct script includes update routine with backups, Bun install, and fetch_and_deploy_gh_release usage. Also update documentation: refine contribution guide (CONTRIBUTING.md) with fork/testing workflow, templates, and metadata guidance; expand misc README to reflect canonical misc/* function library responsibilities and references.

json/degoog.json

@@ -0,0 +1,44 @@
+{
+    "name": "degoog",
+    "slug": "degoog",
+    "categories": [
+        0
+    ],
+    "date_created": "2026-03-20",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 4444,
+    "documentation": "https://fccview.github.io/degoog/",
+    "website": "https://github.com/fccview/degoog",
+    "logo": "https://raw.githubusercontent.com/fccview/degoog/main/src/public/images/degoog-logo.png",
+    "config_path": "/opt/degoog/.env",
+    "description": "Search aggregator that queries multiple engines and supports plugins, themes, and extension repositories.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/degoog.sh",
+            "resources": {
+                "cpu": 2,
+                "ram": 2048,
+                "hdd": 6,
+                "os": "Debian",
+                "version": "13"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": [
+        {
+            "text": "Project is currently marked beta upstream and not intended for production use yet.",
+            "type": "warning"
+        },
+        {
+            "text": "Add extension store repositories in Settings after first start (official repo: https://github.com/fccview/fccview-degoog-extensions).",
+            "type": "info"
+        }
+    ]
+}