DOC: Add FAQ and another JIT batcher illustration to documentation (#2400)

src/Documentation/doc/en/help/beginner_faq.md

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+# FAQs for beginners
+
+This page is dedicated for questions often asked by beginners as they explore the game.
+
+The following are advice, as this is a single-player game. However you are free to experiment to see what works best for you.
+
+#### How do I create directories/folders?
+
+These are just a part of the filename. There is no explicit command to create them, rather files with the same prepending "directory" string are bundled together.
+
+#### Should I backdoor all servers?
+
+Short answer:
+Time-consuming for minimal benefits.
+
+Long answer:
+Backdooring a server takes a certain amount of time, and the duration is dependent on your hacking level and the given server's at the time of sending backdoor command.
+
+Given the amount of servers in the network and how often you have to do so after installing augments, it is ill-advised to perform such potentially lengthy tasks unnecessarily.
+
+#### How do I backdoor through scripts?
+
+It is only possible with an endgame ability, or via exploits.
+
+#### Should I target multiple servers or just one?
+
+[EHTs (Early Hacking Templates)](../programming/hackingalgorithms.md) can somewhat benefit from this at very late stages of the game where the player's hacking level is so high a few threads of `ns.hack()` can take all money of even strongest servers within the network.
+
+However, targetting multiple servers is not viable for batchers in particular due to the fact such algorithms do not suffer from over-hacking (a loose term that describes a targeted server being drained of all reserved money).
+
+#### What are the differences between threads and processes?
+
+When you run a script, you spawn a "process" that runs your code. With each process, you can specify a number of threads (default to 1).
+
+"Thread" is simply a multiplier applied to the effect of some actions (e.g., hack, grow, weaken). Using more threads multiplies the effect, but it also multiplies the RAM cost of running the script.
+
+#### Do in-game threads/processes have anything to do with the real life computer threads/processes?
+
+No, in fact the game is run in JavaScript which is single-threaded.