fix: move @electron/docs-parser to runtime dependencies

[erickzhao]

I think this is technically more correct. I noticed that npx @electron/typescript-definitions will fail due to docs-parser being a dev dependency.

> npx @electron/typescript-definitions
Need to install the following packages:
@electron/typescript-definitions@8.15.3
Ok to proceed? (y) y
node:internal/modules/cjs/loader:1080
  throw err;
  ^

Error: Cannot find module '@electron/docs-parser'
Require stack:
- /Users/erick.zhao/.npm/_npx/2a5658ae8c272926/node_modules/@electron/typescript-definitions/dist/utils.js
- /Users/erick.zhao/.npm/_npx/2a5658ae8c272926/node_modules/@electron/typescript-definitions/dist/index.js
- /Users/erick.zhao/.npm/_npx/2a5658ae8c272926/node_modules/@electron/typescript-definitions/dist/bin.js
    at Module._resolveFilename (node:internal/modules/cjs/loader:1077:15)
    at Module._load (node:internal/modules/cjs/loader:922:27)
    at Module.require (node:internal/modules/cjs/loader:1143:19)
    at require (node:internal/modules/cjs/helpers:119:18)
    at Object.<anonymous> (/Users/erick.zhao/.npm/_npx/2a5658ae8c272926/node_modules/@electron/typescript-definitions/dist/utils.js:6:23)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32)
    at Module._load (node:internal/modules/cjs/loader:960:12)
    at Module.require (node:internal/modules/cjs/loader:1143:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/Users/erick.zhao/.npm/_npx/2a5658ae8c272926/node_modules/@electron/typescript-definitions/dist/utils.js',
    '/Users/erick.zhao/.npm/_npx/2a5658ae8c272926/node_modules/@electron/typescript-definitions/dist/index.js',

[MarshallOfSound]

We don't want this, it was a deliberate choice to make ts defs and docs parser separate as you don't need one for the other