Per keyword skill level

[GingrPowr]

Is your feature request related to a problem? Please describe.
In resume it's useful to be able to define the level per skill, and not per category has it's possible right now.
For example:

"skills": [{
  "name": "Web Development",
  "level": "Master",
  "keywords": [
    "HTML",
    "CSS",
    "JavaScript"
  ]

There, only the skill category "Web development" can have a level assigned.

Describe the solution you'd like

"skills": [{
  "name": "Web Development",
  "level": "Master",
  "keywords": [
    { "skill": "HTML", "level": "4/5" },
    { "skill": "CSS", "level": "3/5" },
    { "skill": "JavaScript", "level": "1/5" }
  ]

To be able to assign a level per skill, not to the whole category only.

Describe alternatives you've considered
Using the skill category as a skill, but it's really hard to find a proper theme then: skills would be stylised as headers instead of list items under most themes.

Additional context
If this is already a thing, then the explanation at https://jsonresume.org/schema is not complete.
Also, how the "level" works? Is it possible to use the string as an integer value to display some progression bar/stars? Instead of writting x/5.
Overall I find it hard to have documentation on how skill level works.

[bruhensant]

In this context, I guess, levels are title based.
I can be a "Senior Developer", "Senior" as my level defined by a title.
Levels based on numbers are quite hard to define, how can i assume i have 100% (or 5/5) in all existent knowledge on something (in this case, keyword)?

[GingrPowr]

Maybe this is more of a cultural issue. In my country, employers ask for a graphical indicator to self-guage the level of a skill. Then, it's really a matter of point of view: I rate myself 1/5 on C# because I never used it outside Unity and I never really worked with it, whereas I rate myself 3/5 on Python because I use it a lot more and am a tad bit good at it (for Excel, with numpy and pandas mainly), and finally I rate myself 5/5 at Word because I pretty much did all that could be done with it, to the point I want to have the source code to correct the bugs and enhance the tools. So it's a really subjective indicator, and its not supposed to be compared from one profile to another, but it is often asked for in a resume.