Doc/improving the tutorial for setting up FSRS

[user1823]

This is a draft. I will improve it further if you like the way things are being changed.

[L-M-Sherlock]

@Expertium, have you read this version? I think it is concise.

[user1823]

I have improved this further.

[user1823]

@L-M-Sherlock @Expertium
In the latest commit, I have tried to address most of the feedback received on the Reddit post.
Things to do before merging:

• Add information about the simulator. I don't know much about the simulator. So, I would appreciate help in this regard. Also, if @L-M-Sherlock is planning to incorporate the simulator into the helper add-on soon, we can skip this step.
• Create a page for the advanced methods of optimization and add links to the readme (at two places).
• Add the following text to https://github.com/open-spaced-repetition/fsrs4anki/wiki/The-mechanism-of-optimization.

The optimizer applies Maximum Likelihood Estimation and Backpropagation Through Time to estimate the stability of memory and learn the laws of memory from time-series review logs. Then, it can find the optimal retention to minimize the repetitions via the stochastic shortest path algorithm.

• Add the following text to https://github.com/open-spaced-repetition/fsrs4anki/wiki/The-Algorithm.

The FSRS algorithm is based on a variant of the DSR (Difficulty, Stability, Retrievability) model, which is used to predict memory states.

• Replace the day-mode screenshots in my version of the README with dark-mode screenshots from a Mac (for consistency).

[user1823]

@Expertium, please review this PR so that we can complete this task as soon as possible.

[user1823]

@L-M-Sherlock, this PR has been approved by Expertium. So, I think that you should do a final review and get the TODOs in #424 (comment) completed so that this PR can be merged as soon as possible.

If you are not sure about the simulator, we can peel it off into a new issue and deal with it later.

[L-M-Sherlock]

Sorry for the delay. A bug costed me a night. I will check this PR tomorrow.

[L-M-Sherlock]

• Add information about the simulator. I don't know much about the simulator. So, I would appreciate help in this regard. Also, if @L-M-Sherlock is planning to incorporate the simulator into the helper add-on soon, we can skip this step.

I suggest skipping this step. Because I write a new simulator: https://huggingface.co/spaces/open-spaced-repetition/fsrs4anki_simulator

• Create a page for the advanced methods of optimization and add links to the readme (at two places).

What's the advanced methods?

• Replace the day-mode screenshots in my version of the README with dark-mode screenshots from a Mac (for consistency).

Done in user1823@90ea975

[user1823]

What's the advanced methods?

By advanced methods, I mean

• optimization through command line
• optimizer using @Luc-Mcgrady's version of the helper add-on (with in-built optimizer).

In this PR, there are two places where a link to the page describing these advanced methods should be added. I have mentioned "provide link" there.

[user1823]

By the way, why does the text in the following screenshot have such a low contrast?

[L-M-Sherlock]

By the way, why does the text in the following screenshot have such a low contrast?

It could be affected by my card template's CSS.

• optimization through command line
• optimizer using @Luc-Mcgrady's version of the helper add-on (with in-built optimizer).

I will add a wiki page for them.

[L-M-Sherlock]

In this PR, there are two places where a link to the page describing these advanced methods should be added. I have mentioned "provide link" there.

Done: https://github.com/open-spaced-repetition/fsrs4anki/wiki/Advanced-methods-of-optimization

[user1823]

If you don't have any further comments, you can merge this branch now.