Optimize JsStr::code_points() for Latin1 strings

- Add CodePointIter with specialized Latin1 path
- Latin1 strings avoid UTF-16 conversion overhead
- UTF-16 behavior remains unchanged
- Add tests for both encoding paths
- Include Latin1-compatible characters in tests

Author: Abd002

.github/workflows/rust.yml

@@ -162,7 +162,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Check for typos
-        uses: crate-ci/typos@v1.39.2
+        uses: crate-ci/typos@v1.40.0
 
   clippy:
     name: Lint

Cargo.lock

@@ -51,13 +51,13 @@ small_btree = { version = "~0.1.0", path = "utils/small_btree" }
 # Shared deps
 arbitrary = "1"
 bitflags = "2.10.0"
-clap = "4.5.51"
+clap = "4.5.53"
 colored = "3.0.0"
 cow-utils = "0.1.3"
 fast-float2 = "0.2.3"
-hashbrown = "0.16.0"
-http = { version = "1.3.1" }
-indexmap = { version = "2.12.0", default-features = false }
+hashbrown = "0.16.1"
+http = { version = "1.4.0" }
+indexmap = { version = "2.12.1", default-features = false }
 indoc = "2.0.7"
 itoa = "1.0.15"
 jemallocator = "0.5.4"
@@ -97,13 +97,13 @@ bus = "2.4.1"
 wasm-bindgen = { version = "0.2.97", default-features = false }
 getrandom = { version = "0.3.4", default-features = false }
 console_error_panic_hook = "0.1.7"
-wasm-bindgen-test = "0.3.54"
+wasm-bindgen-test = "0.3.56"
 smol = "2.0.2"
 isahc = "1.7.2"
 rustyline = { version = "17.0.2", default-features = false }
 dhat = "0.3.3"
 quote = "1.0.42"
-syn = { version = "2.0.110", default-features = false }
+syn = { version = "2.0.111", default-features = false }
 proc-macro2 = "1.0"
 synstructure = "0.13"
 measureme = "12.0.3"