[LSP server] Add a new rule to detect mismatch project name

[jaudiger]

When creating a new Brioche project, it could be nice to have a rule that checks if the project.name corresponds to the file name:

• Should warn:

// foo.bri
export const project = {
  name: "bar",
  version: "0.0.1",
};

• Should not warn:

// foo.bri
export const project = {
  name: "foo",
  version: "0.0.1",
};