Implement bootloader #137 (#142)

* Boot: switch to DFU routines. Implements #132 part 1 of 2.

* Boot: boot to DFU shortcut, hard reset USB on each boot. Implements #132 part 2 of 2.

* Deploy scripts: fix path for deploy dfu.

* Bootloader: initial version. Target_f2: rebase, update deployment scripts.

* Bootloader: cleanup, refactor switch2 proc. Readme,wiki: document bootloader.

* Wiki: deploy symlinks as files, bootloader info.

* Target_f2: valid flash size in linker script.

* Github CI: bootloader build and artifacts.

* Bootloader: rename platforms to targets.

* Bootloader: change dfu/os colors.

* disable set -e

* lint code

* add bootloader testing page

Co-authored-by: Aleksandr Kutuzov <aku@plooks.com>
Co-authored-by: aanper <mail@s3f.ru>

.github/workflows/ci.yml

@@ -63,3 +63,18 @@ jobs:
             target_f2/build/target_prod.bin
             target_f2/build/target_prod.hex
           if-no-files-found: error
+
+      - name: Build bootloader in docker
+        uses: ./.github/actions/docker
+        with:
+          run: make -C bootloader
+
+      - name: Publish bootloader artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: bootloader
+          path: |
+            bootloader/.obj/bootloader.elf
+            bootloader/.obj/bootloader.bin
+            bootloader/.obj/bootloader.hex
+          if-no-files-found: error