add function descriptions

Author: zspitzer

docs/03.reference/01.functions/mavenexists/function.md

@@ -10,6 +10,7 @@ categories:
 - java
 - server
 - devops
+description: Checks whether a Maven artifact is already in Lucee's local maven cache — a cheap filesystem-only predicate with no network or tree walk.
 ---
 
 Checks whether a Maven artifact is present in Lucee's local maven cache directory.

docs/03.reference/01.functions/mavenexport/function.md

@@ -10,6 +10,7 @@ categories:
 - java
 - server
 - devops
+description: Snapshots Lucee's local maven cache as a portable pom.xml listing every cached jar — for reproducible deploys, auditing, and air-gapped rehydration.
 ---
 
 Walks Lucee's local maven cache directory and returns a pom.xml string listing every cached artifact as a `<dependency>` entry.

docs/03.reference/01.functions/mavenimport/function.md

@@ -10,6 +10,7 @@ categories:
 - java
 - server
 - devops
+description: Rehydrates Lucee's local maven cache from a pom.xml, resolving each listed dependency — the inverse of mavenExport for reproducible deploys.
 ---
 
 Parses a pom.xml and resolves each declared `<dependency>` into Lucee's local maven cache, fetching any that are not already present.