deprecate cli/load

This commit deprecates `cli/load` so that we can write a new
implementation, and then make an atomic switch.

Test plan: `yarn test --full`

src/cli/deprecated_load.test.js

@@ -11,7 +11,7 @@ import {
   makeLoadDefaultPlugins,
   loadIndividualPlugin,
   help,
-} from "./load";
+} from "./deprecated_load";
 
 import * as RepoIdRegistry from "../core/repoIdRegistry";
 import {makeRepoId} from "../core/repoId";
@@ -27,7 +27,7 @@ const execDependencyGraph: JestMockFn = (require("../tools/execDependencyGraph")
 const loadGithubData: JestMockFn = (require("../plugins/github/loadGithubData")
   .loadGithubData: any);
 
-describe("cli/load", () => {
+describe("cli/deprecated_load", () => {
   beforeEach(() => {
     jest.clearAllMocks();
     // Tests should call `newSourcecredDirectory` directly when they

src/cli/help.js

@@ -4,7 +4,7 @@
 import type {Command} from "./command";
 import dedent from "../util/dedent";
 
-import {help as loadHelp} from "./load";
+import {help as loadHelp} from "./deprecated_load";
 import {help as analyzeHelp} from "./analyze";
 import {help as pagerankHelp} from "./pagerank";
 import {help as scoresHelp} from "./scores";

src/cli/sourcecred.js

@@ -6,7 +6,7 @@ import type {Command} from "./command";
 import {VERSION_SHORT} from "../core/version";
 
 import help from "./help";
-import load from "./load";
+import load from "./deprecated_load";
 import analyze from "./analyze";
 import pagerank from "./pagerank";
 import scores from "./scores";

src/cli/sourcecred.test.js

@@ -12,7 +12,7 @@ function mockCommand(name) {
 }
 
 jest.mock("./help", () => mockCommand("help"));
-jest.mock("./load", () => mockCommand("load"));
+jest.mock("./deprecated_load", () => mockCommand("load"));
 jest.mock("./analyze", () => mockCommand("analyze"));
 jest.mock("./pagerank", () => mockCommand("pagerank"));
 jest.mock("./clear", () => mockCommand("clear"));