[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/external/dap_link/dap_link.h

@@ -0,0 +1,55 @@
+#pragma once
+#include <stdint.h>
+
+typedef enum {
+    DapModeDisconnected,
+    DapModeSWD,
+    DapModeJTAG,
+} DapMode;
+
+typedef enum {
+    DapVersionUnknown,
+    DapVersionV1,
+    DapVersionV2,
+} DapVersion;
+
+typedef struct {
+    bool usb_connected;
+    DapMode dap_mode;
+    DapVersion dap_version;
+    uint32_t dap_counter;
+    uint32_t cdc_baudrate;
+    uint32_t cdc_tx_counter;
+    uint32_t cdc_rx_counter;
+} DapState;
+
+typedef enum {
+    DapSwdPinsPA7PA6, // Pins 2, 3
+    DapSwdPinsPA14PA13, // Pins 10, 12
+} DapSwdPins;
+
+typedef enum {
+    DapUartTypeUSART1, // Pins 13, 14
+    DapUartTypeLPUART1, // Pins 15, 16
+} DapUartType;
+
+typedef enum {
+    DapUartTXRXNormal,
+    DapUartTXRXSwap,
+} DapUartTXRX;
+
+typedef struct {
+    DapSwdPins swd_pins;
+    DapUartType uart_pins;
+    DapUartTXRX uart_swap;
+} DapConfig;
+
+typedef struct DapApp DapApp;
+
+void dap_app_get_state(DapApp* app, DapState* state);
+
+const char* dap_app_get_serial(DapApp* app);
+
+void dap_app_set_config(DapApp* app, DapConfig* config);
+
+DapConfig* dap_app_get_config(DapApp* app);