Update NuGet setup and optimize artifact paths

Upgraded NuGet setup action to v2 and added caching to speed up package restoration. Changed upload paths of compiled plugins from .zip to .dll to reflect updated build outputs and streamline artifact management.

.github/workflows/main.yml

@@ -23,12 +23,19 @@ jobs:
 
       # Setup NuGet
       - name: Setup NuGet
-        uses: NuGet/setup-nuget@v1
-
+        uses: nuget/setup-nuget@v2
+
+      - uses: actions/cache@v4
+        id: cache
+        with:
+          path: ~/.nuget/packages
+          key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
+
       # Restore NuGet packages
       - name: Restore NuGet packages
+        if: steps.cache.outputs.cache-hit != 'true'
         run: nuget restore "source\Plugins.Filter.slnf"
-
+        
       # Build the solution
       - name: Build solution
         run: msbuild "source\Plugins.Filter.slnf" /p:Configuration=Release /p:SkipSharedProject=true
@@ -46,34 +53,34 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: Plugins
-          path: C:\plugins\*.zip
+          path: C:\plugins\*.dll
 
       - name: Upload Artifact (HI2UC)
         uses: actions/upload-artifact@v4
         with:
           name: HI2UC
-          path: C:\plugins\HI2UC.zip
+          path: C:\plugins\HI2UC.dll
 
       - name: Upload Artifact (HIColorer)
         uses: actions/upload-artifact@v4
         with:
           name: HIColorer
-          path: C:\plugins\HIColorer.zip
+          path: C:\plugins\HIColorer.dll
 
       - name: Upload Artifact (TightHyphen)
         uses: actions/upload-artifact@v4
         with:
           name: TightHyphen
-          path: C:\plugins\TightHyphen.zip
+          path: C:\plugins\TightHyphen.dll
 
       - name: Upload Artifact (LinesUnbreaker)
         uses: actions/upload-artifact@v4
         with:
           name: LinesUnbreaker
-          path: C:\plugins\LinesUnbreaker.zip
+          path: C:\plugins\LinesUnbreaker.dll
 
       - name: Upload Artifact (NoRecursiveDash)
         uses: actions/upload-artifact@v4
         with:
           name: NoRecursiveDash
-          path: C:\plugins\NoRecursiveDash.zip
+          path: C:\plugins\NoRecursiveDash.dll