Adding recommendations to query plan (#1373)

* Adding recommendations

* Adding raw graph type in execution plan graph contracts

* Fixing function name and concising string formatting

* Converting localized string to a function

* Using better names in contract props
Formatting names in a better way

* Getting rid of unnecessary getter, setters and private props

* Fixing localized strings, comments and imports

* Fixing some contracts

* Fixing csproj formatting

* Fixing var names

* Fixing xml comments

src/Microsoft.SqlTools.ServiceLayer/Localization/sr.strings

@@ -2219,6 +2219,11 @@ SizeInTeraBytesFormat = {0} TB
 OperatorDisplayCost(double cost, int percentage) = {0:0.#######} ({1}%)
 #Would like to display actual rows and estimated rows in two lines: <number_actual_rows> of\n <number_estimated_rows> (xx%)
 ActualOfEstimated(string actual, string estimated, decimal percent) = {0} of\n{1} ({2}%)
+;"Missing Index (Impact {0}): {1}" format string for showplan
+MissingIndexFormat(string impact, string queryText) = Missing Index (Impact {0}): {1}
+;title of missing index details
+MissingIndexDetailsTitle(string fileName, string impact) = /*\r\nMissing Index Details from {0}\r\nThe Query Processor estimates that implementing the following index could improve the query cost by {1}%.\r\n*/
+
 
 ############################################################################
 # Table Designer