[FL-3629] fbt: reworked assets & resources handling (#3160)

* fbt: reworking targets & assets handling WIP
* fbt: dist fixes
* fbt: moved SD card resources to owning apps
* unit_tests: moved resources to app folder
* github: updated unit_tests paths
* github: packaging fixes
* unit_tests: fixes
* fbt: assets: internal cleanup
* fbt: reworked assets handling
* github: unit_tests: reintroducing fixes
* minor cleanup
* fbt: naming changes to reflect private nature of scons tools
* fbt: resources: fixed dist archive paths
* docs: updated paths
* docs: updated more paths
* docs: included "resources" parameter in app manifest docs; updated assets readme
* updated gitignore for assets
* github: updated action versions
* unit_tests: restored timeout; scripts: assets: logging changes
* gh: don't upload desktop animations for unit test run

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

applications/main/u2f/application.fam

@@ -6,6 +6,7 @@ App(
     stack_size=2 * 1024,
     icon="A_U2F_14",
     order=80,
+    resources="resources",
     fap_libs=["assets"],
     fap_category="USB",
     fap_icon="icon.png",

applications/main/u2f/resources/u2f/assets/cert_key.u2f

@@ -0,0 +1,5 @@
+Filetype: Flipper U2F Certificate Key File
+Version: 1
+Type: 0
+IV: E1 56 CE 83 98 FA 59 0D 45 EC 1C EB 34 FC 08 C9
+Data: E1 8C C9 9A 98 F7 B9 50 1E 85 71 8F A4 CE 76 95 87 4F AC 8B 5E D0 1F 13 BA 3B 2E E7 98 73 54 64 58 0A 00 20 55 B8 00 08 58 0A 00 20 50 4E 01 20