gioser-web: add gioser-graph-web module for SVG semantic graph

- New crate: gioser-graph-web (WASM widget)
- Fetches /graph from the gioser API
- Force-directed layout (Fruchterman-Reingold) in Rust
- SVG inline rendering: nodes clickable, colored by camino
- Agnostic container: caller provides div + callback

crates/modules/gioser/gioser-graph-web/Cargo.toml

@@ -0,0 +1,37 @@
+[package]
+name = "gioser-graph-web"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+publish.workspace = true
+
+[dependencies]
+wasm-bindgen.workspace = true
+wasm-bindgen-futures.workspace = true
+js-sys.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+
+[dependencies.web-sys]
+workspace = true
+features = [
+    "Window",
+    "Document",
+    "Element",
+    "HtmlElement",
+    "SvgElement",
+    "SvgSvgElement",
+    "SvgCircleElement",
+    "SvgLineElement",
+    "SvgTextElement",
+    "SvgTextContentElement",
+    "SvgGraphicsElement",
+    "Node",
+    "CssStyleDeclaration",
+    "DomRect",
+    "Event",
+    "EventTarget",
+    "MouseEvent",
+    "console",
+]