fix user guide so that images can be viewed in jar

src/main/java/seedu/siasa/ui/GuideWindow.java

@@ -22,11 +22,11 @@ private enum Page {
             "Welcome to SIASA! "
                 + "This is a guide that teaches you all the basic commands to use this application.\n"
                 + "For a more detailed guide, visit the user guide on our github repository.",
-            new Image("file:src/main/resources/images/guide/page_one.png")),
+            "/images/guide/page_one.png"),
         TWO("User Guide - Contacts", "addcontact: Adds a contact to your SIASA.\n"
             + "Format: addcontact n/NAME p/PHONE_NUMBER e/EMAIL a/ADDRESS [t/TAG]\n"
             + "Example: addcontact n/Travis Scott p/98765454 e/[email protected] a/Travis Park, block 123, #01-01",
-            new Image("file:src/main/resources/images/guide/page_two.png")),
+           "/images/guide/page_two.png"),
         THREE("User Guide - Contacts",
             "deletecontact: Removes a contact from your SIASA based on the index provided.\n"
                 + "Format: deletecontact INDEX\n"
@@ -37,13 +37,13 @@ private enum Page {
                 + "At least one of the optional fields should be filled.\n"
                 + "Format: editcontact INDEX [n/NAME] [p/PHONE] [e/EMAIL] [a/ADDRESS] [t/TAG]…\n"
                 + "Example: editcontact 3 p/91234567 e/[email protected]",
-            new Image("file:src/main/resources/images/guide/page_four.png")),
+            "/images/guide/page_four.png"),
         FIVE("User Guide - Policies",
             "addpolicy: Adds a policy that is linked to a contact to your SIASA.\n"
                 + "addpolicy n/POLICY_NAME p/PMT_AMOUNT_CENTS [PMTS_PER_YR] [NUM_OF_PMTS] "
                 + "c/COMMISSION_% NUM_OF_COMM cl/CONTACT_INDEX [e/COVERAGE_EXPIRY_DATE] [t/TAG]…\n"
                 + "Example: addpolicy n/full life p/10050 c/10 1 cl/1 e/2021-12-12 t/Aviva ",
-            new Image("file:src/main/resources/images/guide/page_five.png")),
+            "/images/guide/page_five.png"),
         SIX("User Guide - Policies",
             "deletepolicy: Removes a policy from your SIASA based on the index provided.\n"
                 + "deletepolicy INDEX\n"
@@ -55,7 +55,7 @@ private enum Page {
                 + "Format: editpolicy INDEX [n/NAME_OF_POLICY] [p/PMT_AMOUNT [PMT_FREQ] [NUM_OF_PMT]] "
                 + "[c/COMMISSION_% [NUM_OF_PMT]] [cl/PERSON_INDEX] [t/TAGS] [e/COVERAGE_EXPIRY_DATE]\n"
                 + "Example: editpolicy 2 n/Life Policy 2 e/2022-10-22",
-            new Image("file:src/main/resources/images/guide/page_seven.png")),
+            "/images/guide/page_seven.png"),
         EIGHT("User Guide - Policies",
             "contactpolicy: List the policies belonging to the contact based on the index provided.\n"
                 + "contactpolicy INDEX\n"
@@ -65,7 +65,7 @@ private enum Page {
             "allpolicy: List all policies in your SIASA.\n"
                 + "allpolicy\n"
                 + "Example: allpolicy",
-            new Image("file:src/main/resources/images/guide/page_nine.png"));
+            "/images/guide/page_nine.png");
 
         private final String title;
         private final String description;