Added limits to documentation

Signed-off-by: Ole Herman Schumacher Elgesem <[email protected]>

Author: olehermanse

content/reference/limits.markdown

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+---
+layout: default
+title: Limits
+categories: [Reference, Limits]
+---
+
+There are various limits enforced in CFEngine, for names and values in both policy, web UI, and other places.
+It can sometimes be relevant for both developers and users to know what limits are in place.
+The term limits is used broadly, referring to different kinds of limits (character limits, rate limits, allowed / blocked characters, etc.).
+
+## Limits in policy language and evaluation
+
+## Limits in reporting data
+
+## Limits in Web UI and Rest API
+
+**URLs:** The URLs used in settings for LLMs and CFEngine Build projects are limited to 2048 characters.
+
+**Group names:** Maximum 100 characters.
+
+**Passwords:** Maximum 20 characters.
+
+### CMDB / group data / host specific data
+
+**Names:** Maximum 255 characters.
+
+**Values:** Maximum 16 000 characters (16k).
+
+## Limits in CFEngine Build
+
+**Moduie names:** Maximum 64 characters.
+Lowercase ASCII alphanumericals, starting with a letter, and possible singular dashes in the middle.
+Uppercase letters and other symbols are not permitted.
+
+**Build steps:** Maximum 256 characters.
+
+**Filenames:** Maximum 128 characters.
+Lowercase and uppercase ASCII letters, dots, dashes, and underscores.
+Spaces and other symbols (like slashes, quotes, and semicolons) are not permitted.
+
+<!--
+
+Todos:
+
+Password attempt limits.
+2FA attempt limits.
+
+Namespace name length.
+Bundle name length.
+Variable name length.
+Qualified name length (namespace:bundle.name).
+Reporting based lengths (truncation of data).
+
+-->