feat: build tinymist targeting web (#1102)

* feat: add web target

* dev: simple package rule

* dev: update web release

* dev: update workspace

* ci: setup wasm pack

* ci: correct path to upload

* ci: build artifact

* fix: update metadata and launch config

crates/tinymist-core/build.rs

@@ -0,0 +1,31 @@
+//! Generates project metadata.
+
+use anyhow::Result;
+use vergen::EmitBuilder;
+
+fn main() -> Result<()> {
+    // Emit the instructions
+    EmitBuilder::builder()
+        .all_cargo()
+        .build_timestamp()
+        .git_sha(false)
+        .git_describe(true, true, None)
+        .all_rustc()
+        .emit()?;
+
+    let metadata = cargo_metadata::MetadataCommand::new().exec().unwrap();
+    let typst = metadata
+        .packages
+        .iter()
+        .find(|package| package.name == "typst")
+        .expect("Typst should be a dependency");
+
+    println!("cargo:rustc-env=TYPST_VERSION={}", typst.version);
+    let src = typst
+        .source
+        .as_ref()
+        .map(|e| e.repr.as_str())
+        .unwrap_or_default();
+    println!("cargo:rustc-env=TYPST_SOURCE={src}");
+    Ok(())
+}