feat(formatrix-core): FD-S01 AsciiDoc parser and renderer

Add asciidoc-parser v0.14 integration for AsciiDoc format support:
- Parse AsciiDoc documents to unified AST
- Render AST back to AsciiDoc format
- Handle sections, paragraphs, code blocks, blockquotes
- Handle media blocks, raw delimited blocks, breaks
- C FFI support for Ada TUI integration
- Feature flag 'asciidoc' for conditional compilation

This completes the SHOULD requirements for all three secondary
formats: RST (FD-S02), Typst (FD-S03), and AsciiDoc (FD-S01).

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Jonathan D.A. Jewell

Cargo.lock

@@ -29,6 +29,7 @@ orgize = { version = "0.9", features = ["chrono"] }
 rst_parser = "0.4"
 document_tree = "0.4"
 typst-syntax = "0.12"
+asciidoc-parser = "0.14"
 
 # Database
 arangors = "0.6"

Cargo.toml

@@ -19,6 +19,7 @@ orgize.workspace = true
 rst_parser.workspace = true
 document_tree.workspace = true
 typst-syntax.workspace = true
+asciidoc-parser.workspace = true
 
 # Serialization
 serde.workspace = true
@@ -35,10 +36,11 @@ pretty_assertions = "1.4"
 proptest = "1.5"
 
 [features]
-default = ["markdown", "djot", "orgmode", "rst", "typst"]
+default = ["markdown", "djot", "orgmode", "rst", "typst", "asciidoc"]
 markdown = []
 djot = []
 orgmode = []
 rst = []
 typst = []
+asciidoc = []
 ffi = []  # Enable C FFI for Ada TUI

crates/formatrix-core/Cargo.toml

@@ -120,6 +120,14 @@ pub unsafe extern "C" fn formatrix_parse(
                 Err(_) => return FfiResult::ParseError,
             }
         }
+        // FD-S01: AsciiDoc support
+        SourceFormat::AsciiDoc => {
+            use crate::formats::AsciidocHandler;
+            match AsciidocHandler::new().parse(content_str, &config) {
+                Ok(d) => d,
+                Err(_) => return FfiResult::ParseError,
+            }
+        }
         // FD-S02: RST support
         SourceFormat::ReStructuredText => {
             use crate::formats::RstHandler;
@@ -136,7 +144,6 @@ pub unsafe extern "C" fn formatrix_parse(
                 Err(_) => return FfiResult::ParseError,
             }
         }
-        _ => return FfiResult::UnsupportedFormat,
     };
 
     let handle = Box::new(DocumentHandle { doc });
@@ -195,6 +202,14 @@ pub unsafe extern "C" fn formatrix_render(
                 Err(_) => return FfiResult::RenderError,
             }
         }
+        // FD-S01: AsciiDoc support
+        SourceFormat::AsciiDoc => {
+            use crate::formats::AsciidocHandler;
+            match AsciidocHandler::new().render(doc, &config) {
+                Ok(s) => s,
+                Err(_) => return FfiResult::RenderError,
+            }
+        }
         // FD-S02: RST support
         SourceFormat::ReStructuredText => {
             use crate::formats::RstHandler;
@@ -211,7 +226,6 @@ pub unsafe extern "C" fn formatrix_render(
                 Err(_) => return FfiResult::RenderError,
             }
         }
-        _ => return FfiResult::UnsupportedFormat,
     };
 
     let c_string = match CString::new(output.clone()) {