Add a function to help migrate from Bookdown to Quarto book (#271)

* Add a function to help migrate from Bookdown to Quarto book

Scan a bookdown book and report all the ref and blocks that needs
editing.

* Can't use unicode directly in the code and help

* Add to pkgdown

* Try a bigger width

* Add NEWS and bump version

Author: cderv

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: quarto
 Title: R Interface to 'Quarto' Markdown Publishing System
-Version: 1.4.4.9025
+Version: 1.4.4.9026
 Authors@R: c(
     person("JJ", "Allaire", , "[email protected]", role = "aut",
            comment = c(ORCID = "0000-0003-0174-9868")),

NAMESPACE

@@ -2,6 +2,7 @@
 
 export(add_spin_preamble)
 export(check_newer_version)
+export(detect_bookdown_crossrefs)
 export(find_project_root)
 export(get_running_project_root)
 export(is_using_quarto)

NEWS.md

@@ -1,6 +1,8 @@
 # quarto (development version)
 
-- Added `project_path()`, `get_running_project_root()`, and `find_project_root()` functions for Quarto-aware project path construction. These functions provide a consistent way to reference files relative to the project root, working both during Quarto rendering (using `QUARTO_PROJECT_ROOT` environment variables) and in interactive sessions (using intelligent project detection). The `project_path()` function is particularly useful in Quarto document cells where you need to reference data files or scripts from the project root regardless of the document's location in subdirectories (#180).
+- Added `detect_bookdown_crossrefs()` function to help users migrate from bookdown to Quarto by identifying cross-references that need manual conversion. The function scans R Markdown or Quarto files to detect bookdown-specific cross-reference syntax (like `\@ref(fig:label)` and `(\#eq:label)`) and provides detailed guidance on converting them to Quarto syntax (like `@fig-label` and `{#eq-label}`). It offers both compact and verbose reporting modes, with context-aware warnings that only show syntax patterns actually found in your files.
+
+- Added `project_path()`, `get_running_project_root()`, and `find_project_root()` functions for Quarto-aware project path construction. These functions provide a consistent way to reference files relative to the project root, working both during Quarto rendering (using `QUARTO_PROJECT_ROOT` environment variables) and in interactive sessions (using intelligent project detection). The `project_path()` function is particularly useful in Quarto document cells where you need to reference data files or scripts from the project root regardless of the document's location in subdirectories (#180).0).
 
 - `quarto_preview()` now explicitly returns the preview server URL (invisibly) and documents this behavior. This enables programmatic workflows such as taking screenshots with **webshot2** or passing the URL to other automation tools (thanks, @cwickham, #233).