[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/openocd.py

@@ -0,0 +1,46 @@
+from SCons.Builder import Builder
+from SCons.Action import Action
+from SCons.Defaults import Touch
+import SCons
+
+__OPENOCD_BIN = "openocd"
+
+_oocd_action = Action(
+    "${OPENOCD} ${OPENOCD_OPTS} ${OPENOCD_COMMAND}",
+    "${OPENOCDCOMSTR}",
+)
+
+
+def generate(env):
+    env.SetDefault(
+        OPENOCD=__OPENOCD_BIN,
+        OPENOCD_OPTS="",
+        OPENOCD_COMMAND="",
+        OPENOCDCOM="${OPENOCD} ${OPENOCD_OPTS} ${OPENOCD_COMMAND}",
+        OPENOCDCOMSTR="",
+    )
+
+    env.Append(
+        BUILDERS={
+            "OpenOCDFlash": Builder(
+                action=[
+                    _oocd_action,
+                    Touch("${TARGET}"),
+                ],
+                suffix=".flash",
+                src_suffix=".bin",
+            ),
+        }
+    )
+
+
+def exists(env):
+    try:
+        return env["OPENOCD"]
+    except KeyError:
+        pass
+
+    if openocd := env.WhereIs(__OPENOCD_BIN):
+        return openocd
+
+    raise SCons.Errors.StopError("Could not detect openocd")