DOC: Move all docs into en/ subdirectory (#1505)

* DOC: Move all docs into en/ subdirectory

PR #1502 is working on adding a Chinese translation to the docs. In
general, I encouraged this (in #1452) as a path towards getting useful
translated content in the game without requiring a massive
refactor/rearchitecting of everything.

To support this, this takes the first step of moving our docs into an
en/ subdirectory, so that other languages can live alongside. No effort
is made at this time to support or select between alternate languages;
this is a pure-rename refactor.

src/Documentation/doc/en/basic/programs.md

@@ -0,0 +1,16 @@
+## Programs
+
+In Bitburner "Programs" refer specifically to the list of `.exe` files found in the Programs tab of the side menu.
+
+Unlike [scripts](scripts.md) you write for yourself with JavaScript, Programs are supplied to you by Bitburner and are only "programs" in name; they do not require or allow you to access actual lines of code. Instead once you have a Program you will be able to use it directly as a function in the [Terminal](terminal.md) or scripts.
+
+    [n00dles /]>  run BruteSSH.exe
+    [n00dles /]>  scan-analyze 10
+
+or
+
+    ns.sqlinject("n00dles")
+
+After meeting the [Hacking Skill level](stats.md) threshold shown on each Program, you have the option to Create Program, allowing you to do that as a focused or unfocused activity. The time needed to create a Program generally increases with their level requirement, and scales with your [stats](stats.md).
+
+Alternatively, you may also find the same Programs available for purchase by connecting to the in-game `Darkweb`, accessed after finding a tech store in a City and purchasing Tor [("The Onion Router")](<https://en.wikipedia.org/wiki/Tor_(network)>).