Initial commit with a mostly working engine.

Basic commands are being parsed. I think the only weird part is the
'use' command because it needs to possibly target two things. A tiny
test example is provided in __main__, this will probably be broken out
later.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

agame/color.py

@@ -0,0 +1,39 @@
+import re
+
+
+__all__ = ("colorize",)
+
+BOLD_PAT = re.compile(r"\*\*(.+?)\*\*", re.MULTILINE)
+ITALIC_PAT = re.compile(r"//(.+?)//", re.MULTILINE)
+INTEREST_PAT = re.compile(r"\(\((.+?)\)\)", re.MULTILINE)
+SHADOW_PAT = re.compile(r"\{\{(.+?)\}\}", re.MULTILINE)
+
+BOLD_COL = "\u001b[1m"
+ITALIC_COL = "\u001b[3m"
+INTEREST_COL = "\u001b[34;1m"
+SHADOW_COL = "\u001b[30;1m"
+RESET_COL = "\u001b[0m"
+
+
+def colorize(text: str) -> str:
+    """
+    Colorizes text for output on an ANSI terminal.
+
+    This will use escape codes to replace things.
+
+    Style guide:
+        ((This)) is "interest" styling. This will make the text blue.
+        {{This}} is "shadow" styling. This will make the text a dark grey (or at
+                 least, more subtle.)
+    """
+    replacements = [
+        (INTEREST_PAT, INTEREST_COL),
+        (SHADOW_PAT, SHADOW_COL),
+        (BOLD_PAT, BOLD_COL),
+        (ITALIC_PAT, ITALIC_COL),
+    ]
+
+    for (pat, col) in replacements:
+        text = pat.sub(col + r"\1" + RESET_COL, text)
+
+    return text