docs: add shared exercise docs (#39)

Author: vaeng

exercises/shared/.docs/help.md

@@ -1,21 +1,6 @@
 # Help
 
-<!-- TODO: write document
+If you're stuck on something, it may help to look at some of the [available resources](https://exercism.org/docs/tracks/sqlite/resources) or ask [The Exercism Community on Discord](https://exercism.org/r/discord).
 
-  This document should contain track-specific instructions on how to get help when
-  the student is stuck.
-
-  The instructions should be short and to the point.
-
-  You could link to resources like Gitter channels, forums or mailing lists:
-  whatever can help a student become unstuck.
-
-  This document should **not** link to Exercism-wide (track-agnostic) help resources,
-  as those resources will automatically be included in the HELP.md file.
-
-  The links in this document can overlap with those in docs/LEARNING.md or docs/RESOURCES.md
-
-  When a student downloads an exercise via the CLI, this file's contents are
-  included into the HELP.md file.
-
-  See https://exercism.org/docs/building/tracks/shared-files for more information. -->
+Additionally, [StackOverflow](http://stackoverflow.com/questions/tagged/sqlite) is a good spot to search for your problem/question to see if it has been answered already.
+If not, you can always [ask](https://stackoverflow.com/help/how-to-ask) or [answer](https://stackoverflow.com/help/how-to-answer) someone else's question.

exercises/shared/.docs/tests.md

@@ -1,15 +1,9 @@
 # Tests
 
-<!-- TODO: write document
+Navigate to the directory containing the appropriate `${slug}-test.sql` file, where `${slug}` is the name of the exercise, using hyphens instead of spaces and all lowercase (e.g. `hello-world-test.sql` for the `Hello World` exercise).
 
-  This document should contain instructions on how to run the exercise's tests.
+```bash
+sqlite3 -bail < ${slug}-test.sql
+```
 
-  The instructions should be short and to the point.
-
-  The docs/TESTS.md file can contain a more verbose description on how to run tests.
-
-  When a student downloads an exercise via the CLI, this file's contents are
-  included into the HELP.md file.
-
-  See https://exercism.org/docs/building/tracks/shared-files for more information.
--->
+You can find more information in the [sqlite track docs about testing](https://exercism.org/docs/tracks/sqlite/tests).