[FL-2937] Remove resources from API to prevent frequent API version increase (#1935)

* Remove all icons from API
* Music player: icons
* Signal generator: icons
* Bt hid: icons
* Weather station: icons
* Picopass: icons
* File browser test: icons
* Example images: documentation
* Remove global assets header
* Fix picopass

Co-authored-by: あく <alleteam@gmail.com>

applications/debug/file_browser_test/application.fam

@@ -8,4 +8,5 @@ App(
     stack_size=2 * 1024,
     order=150,
     fap_category="Debug",
+    fap_icon_assets="icons",
 )