message: Add link to project tool in toplevel README.
diff: @@ -139,6 +139,13 @@ See https://github.com/google/verible/issues/528
  [`verible-verilog-diff`](./verilog/tools/diff) compares two input files for
  equivalence.
  +### Verible project tool
  +
  +[`verible-verilog-project`](./verilog/tools/project) is a multi-tool that
  +operates on whole Verilog projects, consisting of a file list and related
  +configurations. This serves as a diagnostic tool for analyzing (and potentially
  +transforming) project-level sources.
  +
  ### Code Obfuscator
  [`verible-verilog-obfuscate`](./verilog/tools/obfuscator) transforms Verilog
  