Decouple ArchitecturyPluginExtension from modloaders (#26)

* Decouple ArchitecturyPluginExtension from modloaders

Signed-off-by: shedaniel <daniel@shedaniel.me>

* Several tweaks, and add environment variable maven notation

Signed-off-by: shedaniel <daniel@shedaniel.me>

.github/workflows/snapshot.yml

@@ -1,21 +0,0 @@
-name: Snapshot Compile & Release
-
-on:
-  [pull_request]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - name: Set up JDK 1.8
-        uses: actions/setup-java@v1
-        with:
-          java-version: 1.8
-      - name: Upload to Maven
-        run: ./gradlew publish
-        env:
-          MAVEN_PASS: ${{ secrets.MAVEN_PASS }}
-          PR_NUM: ${{github.event.number}}