Make syntect use fancy-regex instead of onig

The Oniguruma C library is archived, and fails to build correctly on many systems. Fancy-regex is Rust based and still actively updated, and is able to be built just fine.

Cargo.lock

@@ -1511,6 +1511,17 @@ dependencies = [
  "zune-inflate",
 ]
 
+[[package]]
+name = "fancy-regex"
+version = "0.16.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "998b056554fbe42e03ae0e152895cd1a7e1002aec800fdc6635d20270260c46f"
+dependencies = [
+ "bit-set",
+ "regex-automata",
+ "regex-syntax",
+]
+
 [[package]]
 name = "fast-srgb8"
 version = "1.0.0"
@@ -3927,28 +3938,6 @@ version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
-[[package]]
-name = "onig"
-version = "6.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "336b9c63443aceef14bea841b899035ae3abe89b7c486aaf4c5bd8aafedac3f0"
-dependencies = [
- "bitflags 2.10.0",
- "libc",
- "once_cell",
- "onig_sys",
-]
-
-[[package]]
-name = "onig_sys"
-version = "69.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7f86c6eef3d6df15f23bcfb6af487cbd2fed4e5581d58d5bf1f5f8b7f6727dc"
-dependencies = [
- "cc",
- "pkg-config",
-]
-
 [[package]]
 name = "oorandom"
 version = "11.1.5"
@@ -5620,10 +5609,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "656b45c05d95a5704399aeef6bd0ddec7b2b3531b7c9e900abbf7c4d2190c925"
 dependencies = [
  "bincode 1.3.3",
+ "fancy-regex",
  "flate2",
  "fnv",
  "once_cell",
- "onig",
  "plist",
  "regex-syntax",
  "serde",

Cargo.toml

@@ -221,7 +221,7 @@ sipper = "0.1"
 smol = "2"
 smol_str = "0.2"
 softbuffer = { version = "0.4", default-features = false }
-syntect = "5.1"
+syntect = { version = "5", default-features = false, features = ["default-fancy"] }
 sysinfo = "0.33"
 thiserror = "2"
 tiny-skia = "0.11"