Support for caching the changes in Code Files.

[zymeli]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌
Fixed issues	Support for caching the changes in Code Files.

[what-the-diff]

PR Summary

• Enhancements to CodeFile.php
  The constructor has been modified to check if the current content matches with the original file content, setting the appropriate response. Additionally, new methods for setting and retrieving cache data have been incorporated, and there has been a revision in the 'save' and 'preview' methods for making use of the new caching system. Moreover, the 'diff' method now shows varying differences according to the cache data and actual file contents.

• New Addition in DefaultController.php
  A method named 'actionCacheIt' has been added, enabling the setting of cache for specific files.

• Updates to files.php view
  A new column titled "Cache It" has been introduced, providing a cache button for every file. Supporting JavaScript code has also been added to enable file caching when the button is clicked.

[samdark]

Thanks for contributing. What problem are you trying to solve with the pull request?