feat: add e2e-config alias and update development workflow documentation

- Add cargo alias 'e2e-config' for running E2E configuration tests
- Change 'linter' alias to 'lint' for shorter, more common convention
- Update copilot instructions to reflect split E2E testing approach
- Simplify linting documentation focusing on comprehensive script approach
- Update E2E testing workflow from single command to split provision/config approach

Author: josecelano

.cargo/config.toml

@@ -1,7 +1,8 @@
 [alias]
-linter = "run --bin linter all"
+lint = "run --bin linter all"
 e2e = "run --bin e2e-tests"
 e2e-provision = "run --bin e2e-provision-tests"
+e2e-config = "run --bin e2e-config-tests"
 cov = "llvm-cov"
 cov-lcov = "llvm-cov --lcov --output-path=./.coverage/lcov.info"
 cov-codecov = "llvm-cov --codecov --output-path=./.coverage/codecov.json"

.github/copilot-instructions.md

@@ -33,10 +33,8 @@ This is a deployment infrastructure proof-of-concept for the Torrust ecosystem.
    ```bash
    # Run cargo machete
    cargo machete
-   # Run linters (recommended - tests both stable & nightly)
+   # Run linters
    ./scripts/lint.sh
-   # Or run linters with single toolchain
-   cargo run --bin linter all
    # Run tests
    cargo test
    # Run e2e tests
@@ -53,13 +51,11 @@ This is a deployment infrastructure proof-of-concept for the Torrust ecosystem.
 
 ## 🧪 Build & Test
 
+- **Lint**: `./scripts/lint.sh` (comprehensive - tests stable & nightly toolchains)
+- **Dependencies**: `cargo machete` (mandatory before commits - no unused dependencies)
 - **Build**: `cargo build`
 - **Test**: `cargo test`
 - **Unit Tests**: When writing unit tests, follow conventions described in [`docs/contributing/testing.md`](../docs/contributing/testing.md)
-- **Lint**: `./scripts/lint.sh` (comprehensive - tests stable & nightly toolchains)
-  - Alternative: `cargo run --bin linter all` (single toolchain)
-  - Options: `./scripts/lint.sh --stable` or `./scripts/lint.sh --nightly`
-- **Dependencies**: `cargo machete` (mandatory before commits - no unused dependencies)
-- **E2E**: `cargo run --bin e2e-tests`
+- **E2E Tests**: `cargo e2e-provision && cargo e2e-config`
 
 Follow the project conventions and ensure all checks pass.