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Co-authored-by: Kamal Dodiya <40833799+kamaldodiya@users.noreply.github.com>

- added a Node-based rendering server
- refactored build process (added dedicated script files for development and production build)
- refactored routing, so that it can be reused both on the client and on the server side
- added Page-type components for every app; currently they are the only components that run on the server and add the dynamic meta tags to the page
- updated redux code so that it doesn't try to access browser-specific apis during the startup
Co-authored-by: Kamal Dodiya <kamal@ebi.ac.uk>

* ENSWBSITES-1038: Applying transcript filters to protein view and showing message when there are no transcripts after applying filters on protein view

* repositioning filter and sort box
* readapting grid layout for geneview content to fit in filters
* Update styles to adjust the height of a grid row to the height of its content
* add box-shadow to filter box
* make red dot bigger when filters are active, filter label white when active
* fix background when scrolling for filter label
* using one icon (chevron down) for both chevron up and down and applying relevant transformation
* fix selected tabs when filterbox is open
* Set a minimum height for the panel so that it doesnt look squash when there is one line.
* set min-height in each child body style
* body style is passed as props to panel component

* ENSWBSITES-1129: Launchbar and header update
switch About ensembl and genome data & annotation in launchbar and header
- remove extra html tag not being used
- rename classes to more appropriate name
- code cleanup

- major version bump for rxjs (v6 -> v7)
- removed some of explicit babel transforms (some aren't necessary for our target browsers,
   whereas others are already included in @babel/preset-env)
- replaced the deprecated `node-sass` library with the `sass` library

display multiple uniprot entries

- do not pass non-coding genes to the protein view
- make tab's disabled styles win over the selected styles
- update the message to show in the panel when no data is available

Remove transcript symbols from EV transcript image and GB drawer

- display "None" if gene name is "novel transcript"
- remove the "Source" in square brackets

(ENSWBSITES-1037)

Plus some refactoring to reuse the same components across Help app, contextual help, and About Ensembl.

* New compara and variation stats;

Major updates:
- React from v 16 to v 17
- react-spring from v 8 to v 9
- husky to 6.0.0
- faker (one major version bump)
- eslint-config-prettier

Temporarily added dependency on dotenv-webpack (latest version) to prevent Storybook from crashing.

This finally allows us to remove the dependency on Enzyme.

Also as part of this PR:

- Removed components
  - LaunchbarContainer (serves no purpose)
  - Account (not used)
  - SpeciesTab (superseded by SelectedSpecies component; not used anywhere)
- Removed tests for Launchbar
- Removed the launchbarExpanded and accountExpanded fields from redux and from components
- Changed the keyCode field on KeyboardEvent to event.key
   (typescript marks it as deprecated, whereas Browser support seems to be good these days).

Despite the explicit note I left for myself to remove local settings
from the webpack dev config in PR https://github.com/Ensembl/ensembl-client/pull/478,
I forgot to. Silly me.

* ENSWBSITES-1045: update test scripts to use react-testing library

Forgot to update the import of the sequence downloading web worker into the gene sequence fetcher.
Using the worker loader of webpack 5 now.

The purpose of the component is to give visual feedback to the user
when a press on a button starts a long-running process
that can succeed or fail.

* Do not show arrow if summary and expanded contents are same
Co-authored-by: Manoj Pandian Sakthivel <manojpandian@ebi.ac.uk>

* ENSWBSITES-888: Filter transcript functionality and writing test for the functionality of filtering by so_term

Plus, remove code responsible for selecting assemblies in SpeciesSelector