Scaffold fullstack leptos app (#10)

Also switch license to match that of hyperswitch

.github/workflows/ci-nix.yml

@@ -0,0 +1,13 @@
+name: "CI Nix"
+on:
+  pull_request:
+  push:
+jobs:
+  build:
+    name: All flake outputs
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install Nix
+      uses: DeterminateSystems/nix-installer-action@main
+    - run: nix run nixpkgs#nixci

.gitignore

@@ -1,2 +1,5 @@
-result
+/target
+/result
+/result-lib
+/dist
 .direnv

.vscode/extensions.json

@@ -2,6 +2,7 @@
     "recommendations": [
         "rust-lang.rust-analyzer",
         "mkhl.direnv",
-        "bbenoist.nix"
+        "jnoortheen.nix-ide",
+        "bradlc.vscode-tailwindcss"
     ]
 }

.vscode/settings.json

@@ -1,4 +1,7 @@
 {
-    "nix.enableLanguageServer": true,
-    "nix.serverPath": "nil"
+    "nixEnvSelector.nixFile": "${workspaceRoot}/shell.nix",
+    "rust-analyzer.cargo.features": "all",
+    "editor.formatOnSave": true,
+    // https://twitter.com/sridca/status/1674947342607216641
+    "editor.inlayHints.enabled": "offUnlessPressed"
 }