chore(developer): Cleanup multidimensional array to map

We are using a multidimensional array here instead of a map, due to the conversion from Delphi. One day should clean this up

_Originally posted by @mcdurdin in https://github.com/keymanapp/keyman/pull/9846#discussion_r1382836481_

Regarding
```
function TransformSpecialKeys14(FDebug: boolean, sLayoutFile: string): string {
// Rewrite Special key labels that are only supported in Keyman 14+
// This code is a little ugly but effective.
if(!IsKeyboardVersion14OrLater()) {
for(let i = 0; i < CSpecialText14Map.length; i++) {
// Assumes the JSON output format will not change
if(FDebug) {
sLayoutFile = sLayoutFile.replaceAll('"text": "'+CSpecialText14Map[i][0]+'"', '"text": this._v>13 ? "'+CSpecialText14Map[i][0]+'" : "'+CSpecialText14Map[i][1]+'"');
} else {
sLayoutFile = sLayoutFile.replaceAll('"text":"'+CSpecialText14Map[i][0]+'"', '"text":this._v>13?"'+CSpecialText14Map[i][0]+'":"'+CSpecialText14Map[i][1]+'"');
}
}
}
return sLayoutFile;
}

function TransformSpecialKeys17(FDebug: boolean, sLayoutFile: string): string {
// Rewrite Special key labels that are only supported in Keyman 17+
// This code is a little ugly but effective.
if(!IsKeyboardVersion17OrLater()) {
for(let i = 0; i < CSpecialText17Map.length; i++) {
// Assumes the JSON output format will not change
if(FDebug) {
sLayoutFile = sLayoutFile.replaceAll('"text": "'+CSpecialText17Map[i][0]+'"', '"text": this._v>16 ? "'+CSpecialText17Map[i][0]+'" : "'+CSpecialText17Map[i][1]+'"');
} else {
sLayoutFile = sLayoutFile.replaceAll('"text":"'+CSpecialText17Map[i][0]+'"', '"text":this._v>16?"'+CSpecialText17Map[i][0]+'":"'+CSpecialText17Map[i][1]+'"');
}
}
}
return sLayoutFile;
}
```

Locate the definitions of CSpecialText14Map and CSpecialText17Map, then inspect TransformSpecialKeys14 and TransformSpecialKeys17. Preserve the existing debug and compact JSON replacement behavior while changing the multidimensional-array representation to maps; done means both transformations produce the same output and existing tests still pass.

Written by the indexing model from the issue text.