Try: Add paid newsletter importer

[enejb]

Proposed Changes

• Add special Paid Importer flow for substack.
• This is a just a skeleton flag PR that we can then user to build other things on top.

Why are these changes being made?

See p9Jlb4-cwn-p2

Testing Instructions

visit
/import/newsletter/substack/$site

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-114260

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-114260&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-114260&env=a8c-for-agencies

[matticbot]

This PR modifies the release build for the following Calypso Apps:

For info about this notification, see here: PCYsg-OT6-p2

• blaze-dashboard
• notifications
• odyssey-stats
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug add/paid-importer-try on your sandbox.

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

App Entrypoints (~154 bytes removed 📉 [gzipped])

name                   parsed_size           gzip_size
entry-subscriptions         -264 B  (-0.0%)     -109 B  (-0.0%)
entry-login                 -264 B  (-0.0%)     -109 B  (-0.0%)
entry-domains-landing       -264 B  (-0.0%)     -109 B  (-0.1%)
entry-browsehappy           -264 B  (-0.1%)     -109 B  (-0.2%)
entry-stepper               -191 B  (-0.0%)     -132 B  (-0.0%)
entry-main                  -191 B  (-0.0%)     -131 B  (-0.0%)

Common code that is always downloaded and parsed every time the app is loaded, no matter which route is used.

Sections (~9107 bytes added 📈 [gzipped])

name                        parsed_size           gzip_size
import                         +43253 B  (+9.4%)   +12804 B  (+9.1%)
with-theme-assembler-flow        -416 B  (-0.7%)      -30 B  (-0.3%)
update-options-flow              -416 B  (-0.9%)      -34 B  (-0.6%)
update-design-flow               -416 B  (-0.0%)      -31 B  (-0.0%)
trial-wooexpress-flow            -416 B  (-0.8%)      -31 B  (-0.4%)
tailored-ecommerce-flow          -416 B  (-0.8%)      -34 B  (-0.5%)
site-setup-wg                    -416 B  (-0.6%)      -33 B  (-0.2%)
site-setup-flow                  -416 B  (-0.6%)      -32 B  (-0.2%)
site-migration-flow              -416 B  (-0.7%)      -32 B  (-0.3%)
readymade-template-flow          -416 B  (-0.3%)      -33 B  (-0.1%)
migration-signup                 -416 B  (-0.8%)      -32 B  (-0.4%)
import-flow                      -416 B  (-0.8%)      -34 B  (-0.4%)
hosted-site-migration-flow       -416 B  (-0.7%)      -31 B  (-0.3%)
free-post-setup-flow             -416 B  (-0.9%)      -34 B  (-0.6%)
free-flow                        -416 B  (-0.8%)      -33 B  (-0.4%)
entrepreneur-flow                -416 B  (-0.4%)      -32 B  (-0.1%)
assembler-first-flow             -416 B  (-0.6%)      -39 B  (-0.3%)
ai-assembler-flow                -416 B  (-0.6%)      -32 B  (-0.2%)
patterns                         +299 B  (+0.0%)     -100 B  (-0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Async-loaded Components (~100 bytes removed 📉 [gzipped])

name                                                                         parsed_size           gzip_size
async-load-comment-block-editor                                                   +299 B  (+0.0%)     -100 B  (-0.0%)
async-load-automattic-global-styles-src-components-global-styles-variations       +299 B  (+0.0%)     -100 B  (-0.0%)
async-load-automattic-design-preview                                              +299 B  (+0.0%)     -100 B  (-0.0%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[lezama]

should we wait for the copies to be final before using translate so this doesn't get sent to translators?

[lezama]

needs padding 😄