Convert the toc into sequential text

[rashikawat]

The order of the table of contents was all over the place, so I fixed it so that I could read them in order.
I also categorized each book by the main headings that were in the mind map.

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[spier]

Thank you @rashikawat for trying to improve the discoverability of the Japanese pattern translations.

The TOC is actually autogenerated programmatically. So if we want to change the order in there, we would have to change some scripts etc.

Interesting idea to create a different pattern grouping. Maybe we could express that in a markmap mindmap as well, if it should not work in the TOC directly.

@yuhattor could you help with this PR, as I cannot review the Japanese content that well ;)

FYI I have limited internet access at the moment, so further input from me will take some weeks.

[rashikawat]

@spier Thanks for your comment!

Yes, what I wanted to do was to change the entire table of contents accordingly, since the current mind map is displayed as images and it is not possible to follow links to each pattern.
Also, the mind map has not yet been translated into Japanese.

So, rather than taking an approach of dynamically creating the list with a script, I decided to fix it and make it a static order for reading.