[FL-2832] fbt: more fixes & improvements (#1854)

* github: bundling debug folder with scripts; docs: fixes & updates; fbt: added FAP_EXAMPLES variable to enable building example apps. Disabled by default. fbt: added TERM to list of proxied environment variables
* fbt: better help output; disabled implicit_deps_unchanged; added color to import validator reports
* fbt: moved debug configuration to separate tool
* fbt: proper dependency tracker for SDK source file; renamed linker script for external apps
* fbt: fixed debug elf path
* fbt: packaging sdk archive
* scripts: fixed sconsdist.py
* fbt: reworked sdk packing; docs: updates
* docs: info on cli target; linter fixes
* fbt: moved main code to scripts folder
* scripts: packing update into .tgz
* fbt, scripts: reworked copro_dist to build .tgz
* scripts: fixed naming for archived updater package
* Scripts: fix ぐるぐる回る

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

site_scons/extapps.scons

@@ -21,7 +21,7 @@ appenv = ENV.Clone(
 )
 
 appenv.Replace(
-    LINKER_SCRIPT="application-ext",
+    LINKER_SCRIPT="application_ext",
 )
 
 appenv.AppendUnique(
@@ -106,6 +106,7 @@ appenv.PhonyTarget("firmware_extapps", appenv.Action(legacy_app_build_stub, None
 
 
 Alias("faps", extapps["compact"].values())
+Alias("faps", extapps["validators"].values())
 
 if appsrc := appenv.subst("$APPSRC"):
     app_manifest, fap_file, app_validator = appenv.GetExtAppFromPath(appsrc)