Add upgrade plan

tests/progress.md

@@ -0,0 +1,19 @@
+
+```mermaid
+gantt
+    dateFormat  YYYY-MM-DD
+    title       Qiskit-Tomography-Toolbox Upgrade Plan (3 months cycle)
+    %% excludes    weekends
+    %% (`excludes` accepts specific dates in YYYY-MM-DD format, days of the week ("sunday") or "weekends", but not the word "weekdays".)
+
+    section Tasks
+    Upgrade to Qiskit 1.x          			      :crit, active, task1, 2024-06-01,2024-06-12
+    Shadow-QST	  														:      				 task2, 2024-06-10,2024-06-20
+    New features for HTree  									:      				 task3, 2024-06-10,2024-07-01
+    Develop code for NN-QST										: 				     task4, 2024-06-12,2024-07-15
+    Codebase finished                					:milestone,    m1, 2024-07-15, 0d
+    Codebase review														:crit,    		 task5, 2024-07-15,2024-08-01
+    Benchmark on simulator and hardware			  :         		 task6, 2024-07-15,2024-08-15
+    Add tutorials                 						:						   task7, 2024-08-15,2024-09-01
+```
+