Applications (#10)

* `client-worker`: replace `wasm-pack build` with a script

This enables us to pass the `--split-linked-modules` flag to
`wasm-bindgen`, which we can't do through `wasm-pack`.

* `client-worker`: pin Rust toolchain

* `client-worker`: add support for Wasm atomics

* `flake.nix`: use nightly Rust

* `client-worker`: add support for running applications

* `extension`: run in an offscreen page

* `sample-app`: add support for querying the counter application

* Bump `linera-protocol`

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
     - name: Build the client worker
       run: |
         cd client-worker
-        nix develop '.?submodules=1' --override-input linera-protocol ../linera-protocol --command wasm-pack build --target web
+        nix develop '.?submodules=1' --override-input linera-protocol ../linera-protocol --command bash build.bash
     - name: Build the extension
       run: |
         cd extension

client-worker/.cargo/config.toml

@@ -1,2 +1,8 @@
+[target.wasm32-unknown-unknown]
+rustflags = ["-C", "target-feature=+atomics,+bulk-memory,+mutable-globals"]
+
+[unstable]
+build-std = ["panic_abort", "std"]
+
 [build]
 target = "wasm32-unknown-unknown"

client-worker/.gitignore

@@ -1,3 +1,2 @@
 /target
 /pkg
-Cargo.lock