[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>

targets/ReadMe.md

@@ -0,0 +1,22 @@
+# Flipper firmware
+
+What does it do?
+
+- [x] RTOS
+- [x] FuriHAL
+- [x] FuriCore
+- [x] Services
+- [x] Applications
+
+# Targets
+
+| Name      | Firmware Address  | Reset Combo           | DFU Combo             |
+|-----------|-------------------|-----------------------|-----------------------|
+| f7        | 0x08000000        | L+Back, release both  | L+Back, release Back  |
+
+Also, there is a "hardware" ST bootloader combo available even on a bricked or empty device: L+Ok+Back, release Back, Left.
+Target independent code and headers in `target/include` folders. More details in `documentation/KeyCombo.md`
+
+# Building
+
+Check out `documentation/fbt.md` on how to build and flash firmware.