[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>

scripts/fbt_tools/sconsrecursiveglob.py

@@ -0,0 +1,25 @@
+import SCons
+
+
+def GlobRecursive(env, pattern, node=".", exclude=None):
+    results = []
+    if isinstance(node, str):
+        node = env.Dir(node)
+    for f in node.glob("*", source=True, exclude=exclude):
+        if isinstance(f, SCons.Node.FS.Dir):
+            results += env.GlobRecursive(pattern, f, exclude)
+    results += node.glob(
+        pattern,
+        source=True,
+        exclude=exclude,
+    )
+    # print(f"Glob for {pattern} from {node}: {results}")
+    return results
+
+
+def generate(env):
+    env.AddMethod(GlobRecursive)
+
+
+def exists(env):
+    return True