Root directory content refactoring (#1725)

* Root directory refactoring: - move info about Bootup Logo from a sepatate README to main README; - replace separate root scripts build.sh and start_dev.sh by root Makefile; - make Scripts directory and move there: flash_ts100_linux.sh script, ci/ directory, dockerfile, LICENSE_RELEASE, and PULL_REQUEST_TEMPLATE; - reconfigure build & deploy scripts according to changes

* Scripts => scripts

* Scripts -> scripts: re-add missing renamed files

* Directories refactoring: add top-level Makefile, add scripts/deploy.sh script, move github templates from top-level dir to .github, organize files inside Development Resources

* Update scripts/deploy.sh accroding to codestyle syntax shellcheck

* Makefile: add docs-deploy target for mkdocs gh-deploy

* Rename IronOS.yml > Env.yml, update related files

* Docs configs: remove empty characters

* docs/devel: update usage of new script

README.md

@@ -67,9 +67,15 @@ For notes on installation for your device, please refer to the flashing guide fo
 - Boost mode lets you temporarily change the temperature when soldering (i.e. raise the temperature for short periods)
 - (TS100/Pinecil) Battery charge level indicator if power source set to a lipo cell count
 - (TS80/TS80P/Pinecil) Power bank operating voltage is displayed
-- [Custom boot up logo support](https://ralim.github.io/IronOS/Logo/)
+- [Custom boot up logo support](https://ralim.github.io/IronOS/Logo/)[^bootlogo]
 - Automatic LCD rotation based on the orientation
 
+
+[^bootlogo]: **BOOTUP LOGO NOTICE**:
+  IronOS supports both a bootup logo _AND_ bootup animations.
+  However, _**they are no longer included in this repo**_.
+  **Please, [read the docs](https://ralim.github.io/IronOS/Logo/) for more information**.
+
 ## Menu System
 
 This new firmware uses a new menu system to allow access to the settings on the device.