Added back plutovg as a submodule, added option to use system version

.github/workflows/main.yml

@@ -7,6 +7,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Build with meson
         run: |
           pip install meson
@@ -25,6 +27,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Build with meson
         run: |
           pip install meson
@@ -43,6 +47,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Build with meson
         run: |
           pip install meson

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "plutovg"]
+	path = plutovg
+	url = https://github.com/sammycage/plutovg.git

CMakeLists.txt

@@ -6,15 +6,10 @@ set(LUNASVG_VERSION_MICRO 0)
 
 project(lunasvg LANGUAGES CXX VERSION ${LUNASVG_VERSION_MAJOR}.${LUNASVG_VERSION_MINOR}.${LUNASVG_VERSION_MICRO})
 
-include(FetchContent)
-FetchContent_Declare(plutovg
-    GIT_REPOSITORY https://github.com/sammycage/plutovg.git
-    GIT_TAG main
-    GIT_SHALLOW ON
-    FIND_PACKAGE_ARGS 0.0.4
-)
-
-FetchContent_MakeAvailable(plutovg)
+find_package(plutovg 0.0.4 QUIET)
+if(NOT plutovg_FOUND)
+    add_subdirectory(plutovg)
+endif()
 
 set(lunasvg_sources
     source/lunasvg.cpp