docs: update zh-cn customisation guide (#11)

This is re-PR'ed from quisquous#6052

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This is the following up for quisquous#6047 , also fix several
typos in English version.


According to [Microsoft's localisation
guide](https://learn.microsoft.com/en-us/globalization/localization/ministyleguides/mini-style-guide-sim-chinese)
and [vinta's 盤古之白 convince](https://github.com/vinta/pangu.js), this PR
do the following:

- Add missing lines in the previous PR.
- Replace all polite `您` to a normal `你`.
- Insert spaces between Chinese characters and western characters or
symbols (the `Pangu`-ism).
- Captalize all English words, unless it has a special spell rule.

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cc @Echoring @ShadyWhite

docs/CactbotCustomization.md

@@ -186,7 +186,7 @@ and they don't expose a lot of knobs to tune.
 If you have particular things you want to change about the timeline bars that you can't,
 please feel free to submit a [github issue](https://github.com/OverlayPlugin/cactbot/issues/new/choose).
 
-**Warning**: cactbot makes no guarantees about preserving CSS backwards compatability.
+**Warning**: cactbot makes no guarantees about preserving CSS backwards compatibility.
 Future changes to cactbot may rearrange elements,
 change element names and classes,
 or change styling entirely.
@@ -388,7 +388,7 @@ The steps to override a timeline are:
     [ui/raidboss/data/05-shb/ultimate/the_epic_of_alexander.txt](../ui/raidboss/data/05-shb/ultimate/the_epic_of_alexander.txt)
     to `user/the_epic_of_alexander.txt`.
 
-1) Add a section to your user/raidboss.js file to override this.
+1) Add a section to your `user/raidboss.js` file to override this.
 
     Like adding a trigger, you add a section with the `zoneId`,
     along with `overrideTimelineFile: true`,
@@ -458,7 +458,7 @@ provide access to.
 
 ## Global Trigger File Imports
 
-User files are `eval`'d in JavaScript,
+User files are [`eval`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval)'d in JavaScript,
 and thus cannot `import` in the same way that built-in trigger files do.
 User javascript files have access to the following globals: