[FL-2675] /int space reservation (#1448)

* storage: added global #defines for /int, /ext & /any
* storage: introduced PATH_EXT, PATH_INT& PATH_ANY macros
* core apps: moved hardcoded config files names to separate headers; prefixed them with "."; updater: added file name migration to new naming convention on backup extraction
* storage: fixed storage_merge_recursive handling of complex directory structures; storage_move_to_sd: changed data migration logic to all non-dot files & all folders
* core: added macro aliases for core record names
* Bumped protobuf commit pointer
* storage: reserved 5 pages in /int; denying write&creation of non-dot files when running out of free space

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

site_scons/site_tools/fbt_apps.py

@@ -17,7 +17,7 @@ from fbt.appmanifest import (
 
 def LoadApplicationManifests(env):
     appmgr = env["APPMGR"] = AppManager()
-    for entry in env.Glob("#/applications/*"):
+    for entry in env.Glob("#/applications/*", source=True):
         if isinstance(entry, SCons.Node.FS.Dir) and not str(entry).startswith("."):
             try:
                 appmgr.load_manifest(entry.File("application.fam").abspath, entry.name)