Add reference documentation to docs site and separate out "Tips and Tricks" and "External Editors" from "Recipes" (#1332)

* First draft of command line reference, mostly pulled from help screen

* Add first draft of config file reference, mostly pulled from advanced.md

* Clean up config file doc for readability

* Add --config-file and remove examples from CLI reference

* Add warning about time zone in timeformat

* More small changes, and adding template config keyword

* Cleaning up and re-ordering config file reference

* Clean up reference and anything else from advanced documentation that can live elsewhere and linking to config file reference wherever config file is mentioned

* Fix syntax highlighting in command line reference, clean up content a bit, include --diagnostic

* Mention version config key

* Apply minor changes suggested in PR review

* Rename "recipes" to "Tips and Tricks", pull "External Editors" out of it into its own page, and redirect old recipes link to tips-and-tricks

* Revert broken mkdocs-redirects usage from last commit

docs/encryption.md

@@ -35,6 +35,14 @@ replaces the encrypted journal file with a plain text file. You can also specify
 a filename, e.g., `jrnl --decrypt plain_text_copy.txt`, to leave the original
 encrypted file untouched and create a new plain text file next to it.
 
+!!! note
+    Changing `encrypt` in your [config file](./reference-config-file.md) to
+    a different value will not encrypt or decrypt your
+    journal file. It merely says whether or not your journal
+    is encrypted. Hence manually changing
+    this option will most likely result in your journal file being
+    impossible to load. This is why the above commands are necessary.
+
 ## Storing Passwords in Your Keychain
 
 Nobody can recover or reset your `jrnl` password. If you lose it,