fix(tesseract/regex): support unicode characters

Mostly from the first part of regexify_text

Cargo.lock

@@ -935,7 +935,7 @@ dependencies = [
  "httpdate",
  "itoa",
  "pin-project-lite",
- "socket2 0.4.10",
+ "socket2 0.5.5",
  "tokio",
  "tower-service",
  "tracing",
@@ -2226,6 +2226,7 @@ dependencies = [
  "swordfish-common",
  "tokio",
  "toml",
+ "unicode-segmentation",
 ]
 
 [[package]]
@@ -2762,6 +2763,12 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4c87d22b6e3f4a18d4d40ef354e97c90fcb14dd91d7dc0aa9d8a1172ebf7202"
+
 [[package]]
 name = "untrusted"
 version = "0.9.0"