chore: improve eslint, sb, tsc configs (#483)

Summary:

This commit is a bit of a shotgun fix for various project settings.
Realistically, they could've been separate commits, but this is
convenience for just getting things into a green state to unblock
further work.

Details:

- Use our version of TS in vscode plugins
- organize vscode/settings.json
- fix tsconfig.test and tsconfig.prod (removes errors in test files)
- only use prod tsconfig in webpack
- point .eslintrc to both test and prod configs
- cleanup storybook
- running eslint in my workspace was OOMing. I configured
  maxWorkers like we had in v1 to fix this.
- remove .storybook from code coverage
- remove .js files from code coverage --> after moving away
  from Next.js, we don't allowJS in our tsconfig anymore. We only
  use JS for configurations, it's not allowed in src code!

site/src/components/CodeBlock/index.stories.tsx

@@ -9,7 +9,7 @@ Started container user
 Using user 'coder' with shell '/bin/bash'`.split("\n")
 
 export default {
-  title: "CodeBlock",
+  title: "CodeBlock/CodeBlock",
   component: CodeBlock,
   argTypes: {
     lines: { control: "text", defaultValue: sampleLines },

site/src/components/CodeExample/CodeExample.stories.tsx

@@ -5,7 +5,7 @@ import { CodeExample, CodeExampleProps } from "./CodeExample"
 const sampleCode = `echo "Hello, world"`
 
 export default {
-  title: "CodeExample",
+  title: "CodeBlock/CodeExample",
   component: CodeExample,
   argTypes: {
     code: { control: "string", defaultValue: sampleCode },

site/src/components/Workspace/Workspace.stories.tsx

@@ -4,7 +4,7 @@ import { Workspace, WorkspaceProps } from "./Workspace"
 import { MockOrganization, MockProject, MockWorkspace } from "../../test_helpers"
 
 export default {
-  title: "Workspace",
+  title: "Workspaces/Workspace",
   component: Workspace,
   argTypes: {},
 }