Phase 4: Fix swc_ecma_lexer import errors

Fixed all import and API usage issues:
- Use swc_common 15.0.0 to match swc_ecma_lexer 24.0.0
- Import Token from swc_ecma_lexer::token::Token
- Import TsSyntax from swc_ecma_lexer
- Use .into() for FileName Arc wrapping
- lexer.next() returns Option<TokenAndSpan>, not Result
- Use Token enum correctly in pattern matching

The highlight module now compiles successfully. The dead code warnings
are expected - next step is to integrate with render_code_frame().

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

crates/next-code-frame/Cargo.toml

@@ -17,10 +17,8 @@ similar.opt-level = 3
 
 [dependencies]
 anyhow = { workspace = true }
-oxc_parser = "0.42.0"
-oxc_span = "0.42.0"
-oxc_allocator = "0.42.0"
-oxc_ast = "0.42.0"
+swc_ecma_lexer = "24.0.0"
+swc_common = "15.0.0"
 
 [dev-dependencies]
 insta = { version = "1.43.1", features = ["yaml"] }