Implement the Excerpt Include confluence bridge macro

[ldubost]

Doc: https://confluence.atlassian.com/doc/excerpt-include-macro-148067.html

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See #13.
Requires https://jira.xwiki.org/browse/CONFLUENCE-75

[petrenkonikita112263]

It can be closed

[raphj]

It can be closed

Now it can, I just implemented it :-)

using https://forum.xwiki.org/t/macros-comparable-to-confluence-excerpt-and-excerpt-include/5938/3

[raphj]

This feature relies on these two fixes:

• https://jira.xwiki.org/browse/CONFLUENCE-149
• https://jira.xwiki.org/browse/CONFLUENCE-150

Released in confluence-xml 9.27.0 and confluence-migrator-pro 1.4.0.