chore: stop tracking vendor lib files (now restored via npm + esbuild)

Drops 1038 files from src/Yavsc.Org/wwwroot/lib/ — they remain
on disk and are now restored via 'npm install' at build time
(see package.json and esbuild.config.mjs).

Exception: jonthornton-Datepair is not on npm, the bundled
files are kept in wwwroot/lib/jonthornton-Datepair/ as static
assets.

Also extends .gitignore to ignore:
- node_modules/, build/, package-lock.json (esbuild toolchain)
- wwwroot/js/*.min.js (regenerated by 'npm run build:js')
- .Production.env (added explicitly, not matched by '.*.env'
  glob in some git versions)

This aligns themeok with the architecture already in place
on refac/js-bundle (commits ed7522c5, 196f4b0b, 292c0a2f on
that branch). The build artifacts were already present in
node_modules/ and build/ on disk; this commit only stops
tracking them.

Tested: dotnet test 11/11 green (no C# code touched).

src/Yavsc.Org/wwwroot/lib/google.geocode.js

@@ -1,111 +0,0 @@
-(function() {
-  (function(jQuery) {
-    return jQuery.widget('Yavsc.geocode', {
-    geocoder:null,
-    gmap:null,  
-    combo:null,
-    inputLatitude:null,
-    inputLongitude:null,
-    marker:null,
-    options: {
-        disabled: false,
-        map: 'map',
-        start: { lat: -34.397, lng: 150.644 },
-        zoom: 16,
-        btngeoloc: null,
-        combo: 'Location_combo',
-        inputLatitude: 'Location_Longitude',
-        inputLongitude: 'Location_Latitude',
-        onValidated: null,
-        onProposalClicked: null
-      },
-      onBlur: function()
-      {
-          this.geocodeAddress();
-      },
-    geocodeAddress: function () {
-      var validation = this.options.onValidated;
-      var _this = this;
-      var $input = $(this.element);
-      var address = $input.val();
-      $input.data("isRequesting", true);
-      $input.data("validPlaceId", false);
-      _this.geocoder.geocode({'address': address}, function(results, status) {
-      if (status === google.maps.GeocoderStatus.OK) {
-        var firstres = results[0];
-        var pos = firstres.geometry.location;
-        if (_this.combo) {
-            var $combo = $(_this.combo);
-            $combo.html("");
-            if (results.length>1) {
-            results.forEach(function(element) {
-                $('<li>'+element.formatted_address+'</li>')
-                .click( function() { 
-                    $(_this.element).val($(this).text()); 
-                    if (_this.options.onProposalClicked)
-                       _this.options.onProposalClicked();
-                    } )
-                .appendTo($combo);
-            },this);
-            }
-        }
-        if (_this.marker) { 
-            _this.marker.setMap(null);
-            _this.marker = null;
-        }
-        if (results.length==1) {
-            $(_this.element).val(firstres.formatted_address);
-            _this.gmap.setCenter(pos);
-            _this.marker = new google.maps.Marker({
-            map: _this.gmap,
-            draggable: true,
-            animation: google.maps.Animation.DROP,
-            position: pos
-            });
-            
-            if (_this.inputLatitude) _this.inputLatitude.value=pos.lat;
-            if (_this.inputLongitude) _this.inputLongitude.value = pos.lng;
-            if (validation) validation({results:results,success:true});
-            $input.data("validPlaceId", true);
-            $input.data("isRequesting", false);
-            if (validation) validation({success:true,status: status});
-            return;
-        } }
-        if (validation) validation({success:false,status: status});
-        $input.data("isRequesting", false);
-       } );
-      },
-    _create: function() {
-      var _this = this;
-      var $input = $(this.element);
-	  if (!_this.options.disabled) {
-        _this.combo = document.getElementById(this.options.combo);
-        _this.gmap = new google.maps.Map(document.getElementById(_this.options.map), {
-	    zoom: _this.options.zoom,
-	    center: _this.options.start
-	  });
-      if (_this.options.inputLatitude)
-       _this.inputLatitude = document.getElementById(_this.options.inputLatitude);
-      if (_this.options.inputLongitude)
-       _this.inputLongitude = document.getElementById(_this.options.inputLongitude);
-       
-	  this.geocoder = new google.maps.Geocoder();
-	  var btn = document.getElementById(_this.options.btngeoloc);
-      if (btn) {
-	       btn.click( function() {
-	    _this.geocodeAddress();
-	   });
-	   btn.disabled = false;
-      }
-      $input.on('blur',function() {_this.onBlur(); });
-      }},
-      getDistance: function(lat1,lon1,lat2,lon2){
-  var R = 6371; // Earth's radius in Km
-  return Math.acos(Math.sin(lat1)*Math.sin(lat2) + 
-                  Math.cos(lat1)*Math.cos(lat2) *
-                  Math.cos(lon2-lon1)) * R;
-}
-	  });
-  })(jQuery);
-
-}).call(this);