faploader: more subsystem headers in API table (#1742)

* faploader: more subsystem headers in API table; not counting header entries for SDK version change
* subghz: removed dead function
* Adjusted API version
* hal: removed furi_hal_power_get_system_voltage
* lib: mbedtls: additional flags for .fap linkage
* fbt: rebuilding assets when git commit id changes
* fbt: removed assets rebuild on git commit id change; added explicit dependency for SDK source on compiled assets parts; removed unneeded sdk regeneration runs
* fbt: changed stock plugins to EXTERNAL apps; restored building app as a PLUGIN as a part of main fw as well as a .fap; readme fixes
* fbt: restored certain apps to PLUGIN type
* fbt: app manifests: renamed version->fap_version, added extra fields
* fbt: fixed version processing after rename

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

fbt_options.py

@@ -73,7 +73,8 @@ FIRMWARE_APPS = {
         "system_apps",
         # Settings
         "settings_apps",
-        # Plugins
+        # Stock plugins - no longer built into fw, now they're .faps
+        # Yet you can still build them as a part of fw
         # "basic_plugins",
         # Debug
         # "debug_apps",