Implement KCA: web reimplementation of XCA PKI workflows

- kaya backend with OIDC sessions, API tokens, Postgres/Tortoise models
- AES-256-GCM private key storage and full certificate/CSR/CRL domain logic
- Sycamore/WASM SPA for vaults, keys, requests, certificates, CRLs and templates
- imports/exports, XCA .xdb migration, Docker Compose stack and tests

web/Cargo.toml

@@ -0,0 +1,46 @@
+[package]
+name = "kca-web"
+version = "0.1.0"
+edition = "2021"
+description = "Sycamore/WASM frontend for KCA"
+
+[dependencies]
+sycamore = "0.9"
+sycamore-router = "0.9"
+gloo-net = "0.6"
+gloo-timers = "0.3"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+wasm-bindgen = "0.2"
+wasm-bindgen-futures = "0.4"
+web-sys = { version = "0.3", features = [
+    "Window",
+    "Document",
+    "Location",
+    "Storage",
+    "HtmlInputElement",
+    "HtmlSelectElement",
+    "HtmlTextAreaElement",
+    "HtmlAnchorElement",
+    "HtmlElement",
+    "Element",
+    "Event",
+    "EventTarget",
+    "File",
+    "FileList",
+    "Blob",
+    "BlobPropertyBag",
+    "Url",
+    "Navigator",
+    "Clipboard",
+    "HtmlDetailsElement",
+    "HtmlFormElement",
+    "DomTokenList",
+] }
+js-sys = "0.3"
+base64 = "0.22"
+console_error_panic_hook = "0.1"
+
+[profile.release]
+opt-level = "z"
+lto = true