Add replaceEntryUrlExtension plugin for replacing entry URLs

[fiifff]

This extension intercepts RSS entries during insertion, checks the URL against a user-configured list of allowed domains (JSON format), fetches the webpage content via curl, extracts the main content using XPath, and replaces the original entry's content.

• Replaces RSS entry URLs with actual webpage content.
• Allows users to define domain rules for content replacement.
• Usually used to handle cases where the content retrieved via XPath from an article only includes a single title.

[Frenzie]

Code lgtm

[Alkarex]

Hello,
Try:

make fix-all
make test-all

[fiifff]

Since this is my first attempt at writing code and submitting it to GitHub, the automated tests did not pass. I sincerely apologize for this. I will learn all the necessary processes, fix the errors, and resubmit after making the corrections.

[Alkarex]

No worries, do not close this PR but just keep pushing fixes to the same branch.
If you can, try to run locally:

make fix-all
make test-all

[fiifff]

No worries, do not close this PR but just keep pushing fixes to the same branch. If you can, try to run locally:

make fix-all
make test-all

Thank you,I have learned to run tests locally.

make test-all

[Alkarex]

Very good. Try make fix-all as well

[fiifff]

Very good. Try make fix-all as well

I ran make fix-all && make test-all, and no errors were returned. I also updated the README.md file.
Thank you for your guidance.

[fiifff]

VSCode automatically added indentation, and I didn't notice it earlier.

[fiifff]

Should I wait until the next version is released before submitting a new merge request?