[improvement](chat) Add an in_process provider and support offline loading of local embedding models. (#505)

launchers/common/src/main/java/dev/langchain4j/InProcess.java

@@ -0,0 +1,30 @@
+package dev.langchain4j;
+
+class InProcess {
+
+    /***
+     * the model local path
+     */
+    private String modelPath;
+
+    /***
+     * the model's vocabulary local path
+     */
+    private String vocabularyPath;
+
+    public String getModelPath() {
+        return modelPath;
+    }
+
+    public void setModelPath(String modelPath) {
+        this.modelPath = modelPath;
+    }
+
+    public String getVocabularyPath() {
+        return vocabularyPath;
+    }
+
+    public void setVocabularyPath(String vocabularyPath) {
+        this.vocabularyPath = vocabularyPath;
+    }
+}