Add "Initial Guess" Search Strategy

Fix #258 (closed)

theodolite/src/main/kotlin/theodolite/strategies/searchstrategy/GuessStrategy.kt

+package theodolite.strategies.searchstrategy
+
+import io.quarkus.runtime.annotations.RegisterForReflection
+import theodolite.util.Resource
+
+/**
+ * Base class for the implementation of Guess strategies. Guess strategies are strategies to determine the resource
+ * demand we start with in our initial guess search strategy.
+ */
+
+@RegisterForReflection
+abstract class GuessStrategy {
+    /**
+     * Computing the resource demand for the initial guess search strategy to start with.
+     *
+     * @param resources List of all possible [Resource]s.
+     * @param lastLowestResource Previous resource demand needed for the given load.
+     *
+     * @return Returns the resource demand to start the initial guess search strategy with or null
+     */
+    abstract fun firstGuess(resources: List<Resource>, lastLowestResource: Resource?): Resource?
+}
\ No newline at end of file