QtLocation Plugin Improvements

[HTRamsey]

• Add QGeoTiledMap & QGeoFileTileCache overrides
• Improve control of maps caching
• Add engineReady signal
• Add improved network request control for downloading tiles
• Reduce total amount of network access managers created
• Add logging capability to each existing file and new ones
• Implement fetching enabled and fetching initialized
• Removed timer and uses internal QNetworkRequest timeout
• Fixes handling of file resources in QGeoMapReplyQGC
• Fixes finished/error signals in QGeoMapReplyQGC
• Simplify elevation handling in QGeoMapReplyQGC
• Removed unused geocoding
• Converted many dynamic object to static
• Prep for reading custom maps from user provided json file
• Allow Map Provider specific cameracapbilities (like bing limited to 20x zoom)
• Moved a couple of generic functions to QGCApplication
• Optimized parameters with QStringView
• Consolidated QGCMapEngineManager with MapEngineManager Singleton and removed tool inheritance

Future TODO:

• Hook QGCTileCacheWorker into QGeoTileFetcherQGC and QGeoFileTileCacheQGC
• Allow user provided json of custom maps
• Custom tile downloader with QGCNetworkAccessManager
• Custom Qml Map with QGCqdeclarativegeomap, provides access to plugin
• QGCCacheWorker optimizations?
• Hook terrain queries & 3dviewer into existing tile classes
• Override/utitilize remaining functions and signals/slots from QtLocationPlugin classes
• QDeclarativeCircleMapItem for geofence

[mrpollo]

I'm wondering if you have a few minutes to review this one @bkueng

[bkueng]

Sorry, I currently don't have the time to give this the proper review it deserves.
I very much appreciate the good work you're doing @HTRamsey

[HTRamsey]

@bkueng Is this something that I should break down into smaller PRs and this PR would be the eventual end goal, or is this just something out of scope? Either way works for me, I only provided it as I've personally used something similar for years without issue and it provides some cool possibilities to expand on it.

[bkueng]

Yes splitting it up would help, but I'm not really familiar with that part of the code.