Implement external custom components installing from YAML (#1630)

* Move components import loading to importlib MetaPathFinder and importlib.resources

* Add external_components component

* Fix

* Fix

* fix cv.url return

* fix validate shorthand git

* implement git refresh

* Use finders from sys.path_hooks instead of looking for __init__.py

* use github:// schema

* error handling

* add test

* fix handling git output

* revert file check handling

* fix test

* allow full component path be specified for local

* fix test

* fix path handling

* lint

Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>

.github/workflows/ci.yml

@@ -115,7 +115,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ~/.platformio
-          key: test-home-platformio-${{ matrix.test }}-${{ hashFiles('esphome/core_config.py') }}
+          key: test-home-platformio-${{ matrix.test }}-${{ hashFiles('esphome/core/config.py') }}
           restore-keys: |
             test-home-platformio-${{ matrix.test }}-
       - name: Set up environment

.github/workflows/release-dev.yml

@@ -112,7 +112,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ~/.platformio
-          key: test-home-platformio-${{ matrix.test }}-${{ hashFiles('esphome/core_config.py') }}
+          key: test-home-platformio-${{ matrix.test }}-${{ hashFiles('esphome/core/config.py') }}
           restore-keys: |
             test-home-platformio-${{ matrix.test }}-
       - name: Set up environment

.github/workflows/release.yml

@@ -111,7 +111,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ~/.platformio
-          key: test-home-platformio-${{ matrix.test }}-${{ hashFiles('esphome/core_config.py') }}
+          key: test-home-platformio-${{ matrix.test }}-${{ hashFiles('esphome/core/config.py') }}
           restore-keys: |
             test-home-platformio-${{ matrix.test }}-
       - name: Set up environment