feat: add cross-compilation support with --target flag

- Updated build and run commands to accept a --target option for specifying target platforms.
- Enhanced documentation to include cross-compilation usage and supported targets.
- Modified configuration to allow target-specific settings and toolchains.
- Introduced a new test command to run project tests with specified profiles and targets.
- Improved handling of target directories and output structure for different platforms.
- Added support for multiple targets in the configuration file.
- Implemented inheritance for workspace and dependencies based on target and profile.

src/cli/clean.rs

@@ -75,7 +75,7 @@ fn parse_clean_flags(args: &[String]) -> Result<CleanFlags, String> {
 fn clean_from_root(root: &Path, flags: &CleanFlags) -> Result<(), String> {
     let config = Config::open("./dcr.toml").map_err(|err| err.to_string())?;
     if flags.all
-        && let Some(workspace) = parse_workspace(&config, root)?
+        && let Some(workspace) = parse_workspace(&config, flags.profile.as_deref().unwrap_or("debug"), None, root)?
     {
         for member in &workspace.members {
             clean_project_at(&member.path, flags.profile.as_deref())?;