Features/digital safe firmware (#2)

* Added digital safe firmware

* Adjusted build pipelines

---------

Co-authored-by: Andriy Malyshenko <andriy@malyshenko.com>

.github/workflows/build-safe.yml

@@ -0,0 +1,41 @@
+name: Build t1616-password-entry
+
+on: 
+  push:
+    paths:
+      - ./firmware/t1616-password-entry
+  pull_request:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Cache pip
+      uses: actions/cache@v2
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+    
+    - name: Cache PlatformIO
+      uses: actions/cache@v2
+      with:
+        path: ~/.platformio
+        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+    
+    - name: Set up Python
+      uses: actions/setup-python@v2
+    
+    - name: Install PlatformIO
+      run: |
+        python -m pip install --upgrade pip
+        pip install --upgrade platformio
+    
+    - name: Run PlatformIO
+      working-directory: ./firmware/t1616-password-entry
+      run: pio run
+      

.github/workflows/build-starter.yml

@@ -1,6 +1,10 @@
-name: PlatformIO CI
+name: Build t1616-starter
 
-on: [ push, pull_request, workflow_dispatch ]
+on: 
+  push:
+    paths:
+      - ./firmware/t1616-starter
+  pull_request:
 
 jobs:
   build: