Added:

- Workspace support (`[workspace]` with deps ordering)
- `clean --all` for workspace members
Changed:
- Project root discovery for `build/run/clean` (searches parent dirs)
- Workspace paths are excluded from root source scan
- Build output now uses a Cargo-style `Compiling <name> v<version>` line
- Build time now reports total time for the whole build stage (workspace included)
- Cache hits are silent (no compile line when nothing is rebuilt)
- Safer build cache: fingerprints include headers and resolved library files

docs/reference-and-help/cli-reference.md

@@ -7,7 +7,7 @@ dcr new <name>
 dcr init
 dcr build [--debug|--release]
 dcr run [--debug|--release]
-dcr clean [--debug|--release]
+dcr clean [--debug|--release] [--all]
 dcr --help
 dcr --version
 dcr --update
@@ -18,7 +18,7 @@ dcr --update
 - Most commands parse profile from the first argument.
 - `new` requires exactly one argument.
 - `init` and `--update` do not accept extra arguments.
-- `clean` accepts at most one argument.
+- `clean` accepts `--debug|--release` and optional `--all`.
 
 ## Exit behavior overview