Support for conditions/indicators

[janfh]

Implemented support for conditions/indicators. New class Conditional with support for 9 conditions (OR-groups), each with max 9 indicators (grouping by AND) as described in the DDS reference manual. isActive evaluates if conditions are met by given indicator status (DisplayFileIndicators).

[worksofliam]

Sadly there are soms issues during runtime and I also an issue with the frontend code.

Uncaught TypeError: Cannot read properties of undefined (reading '0')
    at editKeyword (main.js:1264:79)

[worksofliam]

@janfh As part of this PR, I think you should run npm run getTsTypesForFile, which will generate the dspf.d.ts file in webui.

[worksofliam]

I am not sure I understand this API very well. It returns the following interface as an array:

interface Condition {
    indicators: Indicator[];
}

but I don't quite understand it, and it could be me. Is this because each condition line can have 3 indicators, and each line is actually a unique condition (because you can use and or or when testing each condition right?)

Perhaps condition also needs an additional property to handle when O is specified?

interface Condition {
    indicators: Indicator[];
    operator?: `and`|`or`; //and is default?
}

[worksofliam]

For example, here is some DDS for a constant:

     A  01 02N03                        8  3'One, Two, not Three'
     A  01
     AA 02

Does this read as three conditions:

1. The first with three indicators, the last negated
2. The second with one indicator
3. The last with one indicator, and with the A (and) condition?