feat: add device-side subtitle overlay using FreeType for rendering Chinese text

- Updated Cargo.toml to include freetype-rs for font rendering.
- Modified message.rs to introduce a new Message variant for subtitles.
- Enhanced HttpPlugin to send subtitle messages to the live2d plugin.
- Implemented text rendering in the live2d plugin using FreeType for Chinese characters.
- Added OpenGL shaders for rendering text overlays.
- Created a new text.rs module for handling text rasterization and texture rendering.
- Updated renderer.rs to integrate subtitle rendering logic.

Cargo.lock

@@ -41,6 +41,12 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "bitflags"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1370e9fc2a6ae53aea8b7a5110edbd08836ed87c88736dfabccade1c2b44bff4"
+
 [[package]]
 name = "bitflags"
 version = "2.11.0"
@@ -215,7 +221,7 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e0e367e4e7da84520dedcac1901e4da967309406d1e51017ae1abfb97adbd38"
 dependencies = [
- "bitflags",
+ "bitflags 2.11.0",
  "block2",
  "libc",
  "objc2",
@@ -314,6 +320,28 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "freetype-rs"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1418e2a055fec8efe18c1a90a54b2cf5e649e583830dd4c71226c4e3bc920c6"
+dependencies = [
+ "bitflags 0.8.2",
+ "freetype-sys",
+ "libc",
+]
+
+[[package]]
+name = "freetype-sys"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eccfb6d96cac99921f0c2142a91765f6c219868a2c45bdfe7d65a08775f18127"
+dependencies = [
+ "libc",
+ "libz-sys",
+ "pkg-config",
+]
+
 [[package]]
 name = "futures-channel"
 version = "0.3.32"
@@ -695,12 +723,24 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1744e39d1d6a9948f4f388969627434e31128196de472883b39f148769bfe30a"
 dependencies = [
- "bitflags",
+ "bitflags 2.11.0",
  "libc",
  "plain",
  "redox_syscall",
 ]
 
+[[package]]
+name = "libz-sys"
+version = "1.1.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85bc9657773828b90eeb625adff10eeac83cc21bbfd8e23a03eaa8a33c9e28d9"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.12.1"
@@ -802,7 +842,7 @@ version = "0.31.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d6d0705320c1e6ba1d912b5e37cf18071b6c2e9b7fa8215a1e8a7651966f5d3"
 dependencies = [
- "bitflags",
+ "bitflags 2.11.0",
  "cfg-if",
  "cfg_aliases",
  "libc",
@@ -924,7 +964,7 @@ version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "60769b8b31b2a9f263dae2776c37b1b28ae246943cf719eb6946a1db05128a61"
 dependencies = [
- "bitflags",
+ "bitflags 2.11.0",
  "crc32fast",
  "fdeflate",
  "flate2",
@@ -1015,7 +1055,7 @@ version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ce70a74e890531977d37e532c34d45e9055d2409ed08ddba14529471ed0be16"
 dependencies = [
- "bitflags",
+ "bitflags 2.11.0",
 ]
 
 [[package]]
@@ -1067,7 +1107,7 @@ version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
 dependencies = [
- "bitflags",
+ "bitflags 2.11.0",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -1226,6 +1266,7 @@ dependencies = [
  "dbus",
  "dbus-crossroads",
  "flate2",
+ "freetype-rs",
  "futures-util",
  "image",
  "libloading",