DOC-3179: RI tutorial restructure (part A)

Author: dwdougherty

src/redis/working_with_hashes.md renamed to src/ds/hashes.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.

src/ds/json/adv-jsonpath.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.

src/ds/json/arrays.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.

src/ds/json/create.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.

src/ds/json/introduction.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.

src/ds/json/learn-more.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.

src/ds/json/modify.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.

src/ds/json/more-adv-jsonpath.md

@@ -0,0 +1,3 @@
+## Placeholder
+
+This is placeholder content.