Clean up help screen, get rid of util.py (#1027)

* More refactoring of cli.py

break up code from cli.py (now in jrnl.py) up into smaller functions
get rid of export mode
move --encrypt and --decrypt to commands.py
clean up the help screen even more
update flag name for import

* reorganize code, move around lots of functions

* clean up import statements

* move run function out of cli and into jrnl

* rename confusingly named function

* move editor function into editor file

* rename parse_args.py to args.py to make room for more args functions

* Fix error in test suite for windows

I accidentally flipped the conditional, so this fixes it.

Co-authored-by: Micah Jerome Ellison <micah.jerome.ellison@gmail.com>

* Update app description on help screen

Co-authored-by: Micah Jerome Ellison <micah.jerome.ellison@gmail.com>

jrnl/prompt.py

@@ -0,0 +1,28 @@
+import getpass
+import sys
+
+
+def create_password(
+    journal_name: str, prompt: str = "Enter password for new journal: "
+) -> str:
+    while True:
+        pw = getpass.getpass(prompt)
+        if not pw:
+            print("Password can't be an empty string!", file=sys.stderr)
+            continue
+        elif pw == getpass.getpass("Enter password again: "):
+            break
+
+        print("Passwords did not match, please try again", file=sys.stderr)
+
+    if yesno("Do you want to store the password in your keychain?", default=True):
+        from .EncryptedJournal import set_keychain
+
+        set_keychain(journal_name, pw)
+    return pw
+
+
+def yesno(prompt, default=True):
+    prompt = f"{prompt.strip()} {'[Y/n]' if default else '[y/N]'} "
+    response = input(prompt)
+    return {"y": True, "n": False}.get(response.lower().strip(), default)