chore: update config files, icons and readme

- Update FUNDING.yml formatting
- Remove debug log in sanitize-pdf.ts
- Adjust test expectation for tool count
- Standardize dependabot.yml quotes
- Update tool icons in config
- Expand and reorganize README features list
- Fix markdown formatting in README

.github/dependabot.yml

@@ -1,15 +1,15 @@
 version: 2
 updates:
-  - package-ecosystem: "npm"
-    directory: "/"
+  - package-ecosystem: 'npm'
+    directory: '/'
     schedule:
-      interval: "daily"
+      interval: 'daily'
     groups:
       npm-dependencies:
         patterns:
-          - "*"
+          - '*'
 
-  - package-ecosystem: "github-actions"
-    directory: "/"
+  - package-ecosystem: 'github-actions'
+    directory: '/'
     schedule:
-      interval: "daily"
+      interval: 'daily'