Uplift theia dependencies from v1.37.2 to 1.40.1

[bhufmann]

Uplift theia dependencies from v1.37.2 to 1.40.1

Perform a 'yarn upgrade' to keep the yarn.lock fully aligned.

Base this uplifted-to Theia version on community [1]'s below.

Fixed compilation error by making constructors of injectable classes
public.

Align to @postContruct changes of new inversify version [2]. Use Theia's
re-export dependencies for inversify according to [3]

Change electron-main location to ../src-gen/backend/ instead of
../src-gen/frontend due to breaking change described here [4]

[1] https://theia-ide.org/releases/
[2] https://github.com/eclipse-theia/theia/blob/master/doc/Migration.md#inversify-60
[3] https://github.com/eclipse-theia/theia/blob/master/packages/core/README.md#re-exports
[4] https://github.com/eclipse-theia/theia/blob/master/CHANGELOG.md#breaking_changes_1.39.0

[marcdumais-work]

There are some breaking changes that occurred in Theia that I noticed have not yet been reflected here. It would probably be good to go through past entries of the migration guide for other things that may have been missed.

1. I think it would be good to use Theia re-exports whenever possible. One example is inversify:

import { inject, injectable } from 'inversify';

becomes:

import { inject, injectable } from '@theia/core/shared/inversify';

2. (at some point) same as 1, use Theia re-exports in general - there may be other similar cases

Mentioned here specifically about Electron, but it points to the complete list of re-exports:
https://github.com/eclipse-theia/theia/blob/master/doc/Migration.md#electron-update

[marcdumais-work]

So far, the code looks good!

[marcdumais-work]

I see the electron version was bumped, probably by the yarn upgrade. It would be good to update the version in electron-builder.yml, to match. (23.3.13)

[bhufmann]

There are some breaking changes that occurred in Theia that I noticed have not yet been reflected here. It would probably be good to go through past entries of the migration guide for other things that may have been missed.

1. I think it would be good to use Theia re-exports whenever possible. One example is `inversify`:

import { inject, injectable } from 'inversify';

becomes:

import { inject, injectable } from '@theia/core/shared/inversify';

2. (at some point) same as 1, use Theia re-exports in general - there may be other similar cases

Mentioned here specifically about Electron, but it points to the complete list of re-exports: https://github.com/eclipse-theia/theia/blob/master/doc/Migration.md#electron-update

Thanks for pointers. I'll update the PR according to the migration guide.

About the re-export comment I'll update the inversify dependency only in this PR, since there is also a new version. The others we can handle in a separate dedicated PR.

[marcdumais-work]

LGTM, thanks Bernd!