Improve dependency checking on install script. (#2399)

Author: fnando

.github/workflows/test-install.yml

@@ -0,0 +1,33 @@
+name: Test Install
+
+on:
+  push:
+    branches: [main, release/**]
+    paths:
+      - install.sh
+      - test_install.rb
+  pull_request:
+    paths:
+      - install.sh
+      - test_install.rb
+
+concurrency:
+  group:
+    ${{ github.workflow }}-${{ github.ref_protected == 'true' && github.sha ||
+    github.ref }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  test-install:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: ruby/setup-ruby@09a7688d3b55cf0e976497ff046b70949eeaccfd # v1.288.0
+        with:
+          ruby-version: ruby
+      - name: Run install tests
+        run: ruby test_install.rb

README.md

@@ -37,6 +37,15 @@ For installation options, run the script with `--help`:
 curl -fsSL https://github.com/stellar/stellar-cli/raw/main/install.sh | sh -s -- --help
 ```
 
+Install with dependency setup (`--install-deps`) to attempt installing:
+
+- Linux development dependencies (`libdbus`/`libudev` development packages; Linux only, not required on macOS)
+- Rust toolchain and `wasm32v1-none` target (for contract build workflows)
+
+```sh
+curl -fsSL https://github.com/stellar/stellar-cli/raw/main/install.sh | sh -s -- --install-deps
+```
+
 Install with Homebrew (macOS, Linux):
 
 ```sh