Features to support better cooperation with Obsidian

[mrtati]

Summary

For my use case with Obsidian, I have added some features that the community might find useful as well.

These features are:

1. When a page or an attachment is downloaded, the last modified and last accessed time stamp of the downloaded file is set to the modification date from Confluence metadata (version.when value), this behavior is unconditional, should avoid unnecessary syncing and should help order files as they were edited on Confluence
2. Expanding the Table of Contents (TOC) macro was made optional by the new config flag export.page_toc , by default true (so no change to existing functionality while true)
3. New config flag export.page_metadata_in_frontmatter was introduced, by default disabled (no change to existing functionality while false), when enabled the front matter is filled with Confluence page metadata:
   • confluence_url: original url of the page, for easy clicking and visiting
   • confluence_version: version number
   • confluence_last_modified: last modification date of the downloaded page
   • confluence_last_editor: display name of the person who did the last change
4. New config flag export.page_always_expand was added, by default disabled (no change to existing functionality while false), when enabled the expand-container blocks are rendered as normal content without the <details>\n<summary> wrapping.

Additionally, there is a correction:

• Inline images were downloaded, but not shown in Obsidian. The reason seems to be that on our Confluence deployment, the image files and attachments do not have a file_id, only an id which is taken from a different html tag. Original implementation was kept, this functionality is additional, if the id is not found in data-media-id, it will be checked in data-linked-resource-id as well.

Test Plan

Manual testing was done by changing the new config flags and observing the difference in output.

[Spenhouet]

@mrtati Thanks for the PR. Can you rebase this and reintegrate into the current version?