[FEATURE] Highlight "dominant" readings

[sihue]

Description Your first association reading this title probably relates to the Onyomi, Kunyomi and Nanori section on the left. That kind of highlighting is also a good idea and could look similar to how 広辞苑 does it.

But what I actually want to suggest goes a little bit deeper than that and touches on what Andrew Scott Conning (KLC) calls "Regular On-Yomi Groups" and Cure Dolly called "Sound Sisters". Here is how Conning describes them: "The on reading of roughly a quarter of [Jouyou] kanji can be learned reliably by mastering a limited number of phonetic components." He suggests to take advantage of these "low-hanging fruit" and so would I. However, until now I wasn't sure if another deck (like the original sound sisters deck) would be the most elegant solution. Then the idea finally came to me that most of this functionality could be neatly weaved into this addon.

Possible implementation What I suggest is a small note in the entry of the phonetic component and color highlighting of the affected kanji in the "Primitive in" section - including different coloring for exceptions.

Take the example of 反: 飯, 坂, 板, 版, 販(, 叛) and 阪 could be highlighted in, say, green whereas 返 and 仮 would be highlighted in red.

Note that I am not suggesting to list phonetic components for every single kanji as those can quickly get complicated and unreliable. A focus on the juggernauts, however, could be a really helpful addition for learners.

I am aware that acquiring and curating this data requires some work, but the limited scope and readily available sources should make it managable.

[saxoncameron]

Tagging as related to #98

[sihue]

I just realized that the title is a little cryptic. I was hinting at dominant genes, meaning "dominant" sound elements that are pervasive through other kanji.