feat(api): add missing ImGui.TableGetSortSpecs API (and related objects) (#246)

* Add missing GetTableSortSpecs API

* Add binding for TreeNodeEx(const char* label, ImGuiTreeNodeFlags flags)

* Add generated files

* Wrap > character in code block

Co-authored-by: SpaiR <klimbetoo@gmail.com>

* Wrap > character in code block

Co-authored-by: SpaiR <klimbetoo@gmail.com>

---------

Co-authored-by: SpaiR <klimbetoo@gmail.com>

imgui-binding/src/generated/java/imgui/ImGuiTableColumnSortSpecs.java

@@ -0,0 +1,66 @@
+package imgui;
+
+import imgui.binding.ImGuiStruct;
+
+/**
+ * Sorting specification for one column of a table.
+ */
+public final class ImGuiTableColumnSortSpecs extends ImGuiStruct {
+
+    public ImGuiTableColumnSortSpecs(final long ptr) {
+        super(ptr);
+    }
+
+    /*JNI
+        #include "_common.h"
+        #define THIS ((ImGuiTableColumnSortSpecs*)STRUCT_PTR)
+     */
+
+    /**
+     * User id of the column (if specified by a TableSetupColumn() call)
+     */
+    public int getColumnUserID() {
+        return nGetColumnUserID();
+    }
+
+    private native int nGetColumnUserID(); /*
+        return THIS->ColumnUserID;
+    */
+
+    /**
+     * Index of the column
+     */
+    public int getColumnIndex() {
+        return nGetColumnIndex();
+    }
+
+    private native int nGetColumnIndex(); /*
+        return THIS->ColumnIndex;
+    */
+
+    /**
+     * Index within parent ImGuiTableSortSpecs (always stored in order starting from 0, tables sorted on a single criteria will always have a 0 here)
+     */
+    public int getSortOrder() {
+        return nGetSortOrder();
+    }
+
+    private native int nGetSortOrder(); /*
+        return THIS->SortOrder;
+    */
+
+    /**
+     * ImGuiSortDirection_Ascending or ImGuiSortDirection_Descending (you can use this or SortSign, whichever is more convenient for your sort function)
+     */
+    public int getSortDirection() {
+        return nGetSortDirection();
+    }
+
+    private native int nGetSortDirection(); /*
+        return THIS->SortDirection;
+    */
+
+    /*JNI
+        #undef THIS
+     */
+}