feat: multi-page export and no-write support (#2098)

## Features

- Support multi-page export in the server export command. Added an extra
arg to decide whether to write to the file or only return data for
client use (page preview in exporter). VSCode users can use this feature
via the quick-export command or code lens.
- (refactor) Move most export logic from tinymist to tinymist-task,
excluding typlite-related, which already depends on tinymist-task.
- Added relevant export tests. The export e2e test now includes hash
checking for all targets.

## Not done

- Support new args in `TypstExtraArgs` for CLI compilation.

---------

Co-authored-by: Myriad-Dreamin <camiyoru@gmail.com>

crates/tinymist-project/src/args.rs

@@ -226,16 +226,25 @@ impl TaskCompileArgs {
         let config = match output_format {
             OutputFormat::Pdf => ProjectTask::ExportPdf(ExportPdfTask {
                 export,
+                pages: self.pages.clone(),
                 pdf_standards: self.pdf.pdf_standard.clone(),
                 creation_timestamp: None,
             }),
             OutputFormat::Png => ProjectTask::ExportPng(ExportPngTask {
                 export,
+                pages: self.pages.clone(),
+                page_number_template: None,
+                merge: None,
                 ppi: self.png.ppi.try_into().unwrap(),
                 fill: None,
             }),
-            OutputFormat::Svg => ProjectTask::ExportSvg(ExportSvgTask { export }),
-            OutputFormat::Html => ProjectTask::ExportSvg(ExportSvgTask { export }),
+            OutputFormat::Svg => ProjectTask::ExportSvg(ExportSvgTask {
+                export,
+                pages: self.pages.clone(),
+                page_number_template: None,
+                merge: None,
+            }),
+            OutputFormat::Html => ProjectTask::ExportHtml(ExportHtmlTask { export }),
         };
 
         Ok(ApplyProjectTask {