Enable Custom Event Subscription

[Muhammad-Altabba]

Description

Fixes #6223 (for this, the way to inherit from Web3Subscription has been simplified)
And #6252

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run lint with success and extended the tests and types if necessary.
• I ran npm run test:unit with success.
• I ran npm run test:coverage and my test cases cover all the lines and branches of the added code.
• I ran npm run build and tested dist/web3.min.js in a browser.
• I have tested my code on the live network.
• I have checked the Deploy Preview and it looks correct.
• I have updated the CHANGELOG.md file in the root folder.
• I have linked Issue(s) with this PR in "Linked Issues" menu.

[github-actions]

Bundle Stats

Hey there, this message comes from a github action that helps you and reviewers to understand how these changes affect the size of this project's bundle.

As this PR is updated, I'll keep you updated on how the bundle size is impacted.

Total

Asset	Old size	New size	Diff	Diff %
Total	646 KB	646 KB	439 bytes	0.07%

View detailed bundle breakdown

Added

No assets were added

Removed

No assets were removed

Bigger

Asset	Old size	New size	Diff	Diff %
../lib/commonjs/web3.d.ts	811 bytes	1.14 KB	361 bytes	44.51%

Smaller

No assets were smaller

Unchanged

Asset	Old size	New size	Diff	Diff %
web3.min.js	629 KB	629 KB	78 bytes	0.01%
../lib/commonjs/index.d.ts	8.56 KB	8.56 KB	0	0.00%
../lib/commonjs/accounts.d.ts	3.67 KB	3.67 KB	0	0.00%
../lib/commonjs/types.d.ts	2.45 KB	2.45 KB	0	0.00%
../lib/commonjs/abi.d.ts	1000 bytes	1000 bytes	0	0.00%
../lib/commonjs/eth.exports.d.ts	280 bytes	280 bytes	0	0.00%
../lib/commonjs/providers.exports.d.ts	148 bytes	148 bytes	0	0.00%
../lib/commonjs/version.d.ts	60 bytes	60 bytes	0	0.00%

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Latest commit:	16117e3
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Preview URL:	https://daca4c18.web3-js-docs.pages.dev
Branch Preview URL:	https://6223-eth-subscription-manage.web3-js-docs.pages.dev

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (4.x@51bc03d). Click here to learn what that means.
The diff coverage is 77.96%.

Additional details and impacted files

@@          Coverage Diff           @@
##             4.x    #6262   +/-   ##
======================================
  Coverage       ?   88.71%           
======================================
  Files          ?      198           
  Lines          ?     7638           
  Branches       ?     2103           
======================================
  Hits           ?     6776           
  Misses         ?      862           
  Partials       ?        0           

Flag	Coverage Δ
UnitTests	88.71% <77.96%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
web3	∅ <ø> (?)
web3-core	∅ <ø> (?)
web3-errors	∅ <ø> (?)
web3-eth	∅ <ø> (?)
web3-eth-abi	∅ <ø> (?)
web3-eth-accounts	∅ <ø> (?)
web3-eth-contract	∅ <ø> (?)
web3-eth-ens	∅ <ø> (?)
web3-eth-iban	∅ <ø> (?)
web3-eth-personal	∅ <ø> (?)
web3-net	∅ <ø> (?)
web3-providers-http	∅ <ø> (?)
web3-providers-ipc	∅ <ø> (?)
web3-providers-ws	∅ <ø> (?)
web3-rpc-methods	∅ <ø> (?)
web3-utils	∅ <ø> (?)
web3-validator	∅ <ø> (?)

[jdevcs]

intersection type using existing CommonSubscriptionEvents, instead of redefining these fields?

[Muhammad-Altabba]

Sorry, this connected should be removed from here, along with error, because its related codes are in the base class. And I had done that just now.
However, regarding connected, it was not used, and there was no code related to it, in any place in this class or in the base class.