[FL-3097] fbt, faploader: minimal app module implementation (#2420)

* fbt, faploader: minimal app module implementation
* faploader, libs: moved API hashtable core to flipper_application
* example: compound api
* lib: flipper_application: naming fixes, doxygen comments
* fbt: changed `requires` manifest field behavior for app extensions
* examples: refactored plugin apps; faploader: changed new API naming; fbt: changed PLUGIN app type meaning
* loader: dropped support for debug apps & plugin menus
* moved applications/plugins -> applications/external
* Restored x bit on chiplist_convert.py
* git: fixed free-dap submodule path
* pvs: updated submodule paths
* examples: example_advanced_plugins.c: removed potential memory leak on errors
* examples: example_plugins: refined requires
* fbt: not deploying app modules for debug/sample apps; extra validation for .PLUGIN-type apps
* apps: removed cdefines for external apps
* fbt: moved ext app path definition
* fbt: reworked fap_dist handling; f18: synced api_symbols.csv
* fbt: removed resources_paths for extapps
* scripts: reworked storage
* scripts: reworked runfap.py & selfupdate.py to use new api
* wip: fal runner
* fbt: moved file packaging into separate module
* scripts: storage: fixes
* scripts: storage: minor fixes for new api
* fbt: changed internal artifact storage details for external apps
* scripts: storage: additional fixes and better error reporting; examples: using APP_DATA_PATH()
* fbt, scripts: reworked launch_app to deploy plugins; moved old runfap.py to distfap.py
* fbt: extra check for plugins descriptors
* fbt: additional checks in emitter
* fbt: better info message on SDK rebuild
* scripts: removed requirements.txt
* loader: removed remnants of plugins & debug menus
* post-review fixes

applications/services/loader/firmware_api/firmware_api.cpp

@@ -0,0 +1,21 @@
+#include "firmware_api.h"
+
+#include <flipper_application/api_hashtable/api_hashtable.h>
+#include <flipper_application/api_hashtable/compilesort.hpp>
+
+/* Generated table */
+#include <symbols.h>
+
+static_assert(!has_hash_collisions(elf_api_table), "Detected API method hash collision!");
+
+constexpr HashtableApiInterface elf_api_interface{
+    {
+        .api_version_major = (elf_api_version >> 16),
+        .api_version_minor = (elf_api_version & 0xFFFF),
+        .resolver_callback = &elf_resolve_from_hashtable,
+    },
+    .table_cbegin = elf_api_table.cbegin(),
+    .table_cend = elf_api_table.cend(),
+};
+
+const ElfApiInterface* const firmware_api_interface = &elf_api_interface;

applications/services/loader/firmware_api/firmware_api.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <flipper_application/elf/elf_api_interface.h>
+
+extern const ElfApiInterface* const firmware_api_interface;