Make good use of "$:/core/modules/utils/base64-utf8/base64-utf8.module.js"
* Add a new base64Encode()
* Both of base64Encode and base64Decode work for Nodejs and Browsers
This adds options.wiki to the object sent to the generateTiddlerFilePath
The function generateTiddlerFilePath can take a wiki in the options object, but generateTiddlerFileInfo doesn't pass the wiki to it.
* add PaletteManager
* add hint for "external" palette-names
* macro utility, for local \import only
this tiddler is never meant to be tagged $:/tags/Macro
contains only a colour macro which allows to call `<<colour "...">>` within a tiddler and get the parameter-name instead of the resolved color
used in the PaletteManager to reveal the original color below the color that just uses its color with the colour macrocall
example:
```
\define get-real-index(string)
\import $:/core/macros/utils
<$wikify $name="result" text="""$string$"""> <- does the "colour" macrocall, but the one that returns the parameter name
<<result>>
</$wikify>
\end
<$set name="color" value={{{ [{$:/palette}getindex[color-of-interest]] }}}>
-> <<colour primary>>
<$wikify name="real-color-index" text="""<$macrocall $name="get-real-index" string=<<color>>/>""">
<<real-color-index>> -> primary
...
```
* transclude PaletteManager in snippets/paletteeditor
* transclude PaletteManager in core/ui/ControlPanel/Palette
* Update ControlPanel.multids
* add style for color inputs in PaletteManager
* Update PaletteManager.tid
* Update PaletteManager.tid
* add tooltips & aria-labels
* Update ControlPanel.multids
* Update PaletteManager.tid
* Update PaletteManager.tid
* Update PaletteManager.tid
* add escapecss filter
this filter would allow creating valid css classes from titles containing special characters
we assign a class to an element using `encodeuricomponent[]` so that the class name is encoded
in a stylesheet we create the classname by `<title>escapecss[]` which applies the uri encoding and escapes characters that need to be escaped
* Update encodings.js
* refactor tagToCssSelector, add escapeCssSelector
* use escapeCssSelector
* escape using CSS.escape if it's available
* Update encodings.js
* revert factoring out escapeCssSelector
