Add gitignore template to published files for codemod

[ijjk]

Ensures this gitignore template is included in the published package since it is required at runtime.

Bug

• Related issues linked using fixes #number
• Integration tests added

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.

Documentation / Examples

• Make sure the linting passes

[ijjk]

Stats from current PR

Default Server Mode (Decrease detected ✓)

General

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
buildDuration	13s	12.8s	-234ms
buildDurationCached	3.2s	3.2s	-9ms
nodeModulesSize	46.5 MB	46.5 MB	✓

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.562	2.581	⚠️ +0.02
/ avg req/sec	975.81	968.74	⚠️ -7.07
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.324	1.335	⚠️ +0.01
/error-in-render avg req/sec	1888.25	1872.29	⚠️ -15.96

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
framework-HASH.js gzip	39.3 kB	39.3 kB	✓
main-HASH.js gzip	20.2 kB	20.2 kB	✓
webpack-HASH.js gzip	804 B	804 B	✓
Overall change	60.3 kB	60.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
_app-HASH.js gzip	801 B	801 B	✓
_error-HASH.js gzip	3.18 kB	3.18 kB	✓
amp-HASH.js gzip	527 B	527 B	✓
css-HASH.js gzip	334 B	334 B	✓
hooks-HASH.js gzip	890 B	890 B	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	333 B	333 B	✓
withRouter-HASH.js gzip	330 B	330 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	8.43 kB	8.43 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
_buildManifest.js gzip	395 B	395 B	✓
Overall change	395 B	395 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
index.html gzip	573 B	573 B	✓
link.html gzip	580 B	580 B	✓
withRouter.html gzip	568 B	568 B	✓
Overall change	1.72 kB	1.72 kB	✓

---

Serverless Mode (Decrease detected ✓)

General

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
buildDuration	14.8s	14.6s	-190ms
buildDurationCached	4.3s	4.2s	-32ms
nodeModulesSize	46.5 MB	46.5 MB	✓

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
framework-HASH.js gzip	39.3 kB	39.3 kB	✓
main-HASH.js gzip	20.2 kB	20.2 kB	✓
webpack-HASH.js gzip	804 B	804 B	✓
Overall change	60.3 kB	60.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
_app-HASH.js gzip	801 B	801 B	✓
_error-HASH.js gzip	3.18 kB	3.18 kB	✓
amp-HASH.js gzip	527 B	527 B	✓
css-HASH.js gzip	334 B	334 B	✓
hooks-HASH.js gzip	890 B	890 B	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	333 B	333 B	✓
withRouter-HASH.js gzip	330 B	330 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	8.43 kB	8.43 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
_buildManifest.js gzip	395 B	395 B	✓
Overall change	395 B	395 B	✓

Serverless bundles Overall decrease ✓

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
_error.js	16.9 kB	16.9 kB	✓
404.html	2.44 kB	2.44 kB	✓
500.html	2.43 kB	2.43 kB	✓
amp.amp.html	10.8 kB	10.8 kB	✓
amp.html	1.63 kB	1.63 kB	✓
css.html	1.81 kB	1.81 kB	✓
hooks.html	1.69 kB	1.69 kB	✓
index.js	17.2 kB	17.2 kB	-2 B
link.js	17.4 kB	17.4 kB	✓
routerDirect.js	17.4 kB	17.4 kB	✓
withRouter.js	17.4 kB	17.4 kB	✓
Overall change	107 kB	107 kB	-2 B

---

Webpack 4 Mode (Increase detected ⚠️)

General

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
buildDuration	11.6s	11.7s	⚠️ +157ms
buildDurationCached	4.7s	4.7s	-37ms
nodeModulesSize	46.5 MB	46.5 MB	✓

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.672	2.629	-0.04
/ avg req/sec	935.76	950.98	+15.22
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.306	1.31	0
/error-in-render avg req/sec	1914.67	1908.49	⚠️ -6.18

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
677f882d2ed8..HASH.js gzip	13.4 kB	13.4 kB	✓
framework.HASH.js gzip	39 kB	39 kB	✓
main-HASH.js gzip	7.99 kB	7.99 kB	✓
webpack-HASH.js gzip	751 B	751 B	✓
Overall change	61.1 kB	61.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
polyfills-HASH.js gzip	31.3 kB	31.3 kB	✓
Overall change	31.3 kB	31.3 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
_app-HASH.js gzip	1.07 kB	1.07 kB	✓
_error-HASH.js gzip	3.85 kB	3.85 kB	✓
amp-HASH.js gzip	536 B	536 B	✓
css-HASH.js gzip	339 B	339 B	✓
hooks-HASH.js gzip	887 B	887 B	✓
index-HASH.js gzip	227 B	227 B	✓
link-HASH.js gzip	1.63 kB	1.63 kB	✓
routerDirect..HASH.js gzip	303 B	303 B	✓
withRouter-HASH.js gzip	302 B	302 B	✓
e025d2764813..52f.css gzip	125 B	125 B	✓
Overall change	9.28 kB	9.28 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
_buildManifest.js gzip	420 B	420 B	✓
Overall change	420 B	420 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js codemod/extra-file	Change
index.html gzip	626 B	626 B	✓
link.html gzip	633 B	633 B	✓
withRouter.html gzip	620 B	620 B	✓
Overall change	1.88 kB	1.88 kB	✓

Commit: 30a5170