test: Fix Unix-only assumptions in ide-build tests; run all tests in CI

The Gradle and Maven tests expected the Unix wrapper and command names, and
the canonical-root test uses Unix absolute paths. CI now reports every
failing test instead of stopping at the first few.

Claude-Session: https://claude.ai/code/session_01B65qLEKnkeYTGdbwhLpjCu

.github/workflows/ci.yml

@@ -42,7 +42,7 @@ jobs:
       - if: runner.os == 'Linux'
         run: cargo fmt --all --check
       - run: cargo clippy --workspace --all-targets -- -D warnings
-      - run: cargo nextest run --workspace
+      - run: cargo nextest run --workspace --no-fail-fast
       - name: Bindings are up to date
         if: runner.os == 'Linux'
         run: pnpm gen:bindings && git diff --exit-code src/bindings.ts