🩹 [Patch]: Add missing description in Get-AstFunctionName documentation (#29)

## Description

This pull request includes minor configuration and documentation
updates. The changes adjust markdown linting rules to allow duplicate
headings in different sections and clarify a comment in a PowerShell
script.

Markdown linting configuration updates:

*
[`.github/linters/.markdown-lint.yml`](diffhunk://#diff-2fd3619d2b7372123257bc21645edb90c24293e66babbc6053033a89e21bab34R16-R19):
Enabled the `MD024` rule with `siblings_only: true` to allow duplicate
headings in different sections, and fixed a minor formatting issue in
the `MD026` rule's punctuation list.

Documentation update:

*
[`src/functions/public/Functions/Get-AstFunctionName.ps1`](diffhunk://#diff-2ee3ffd01095ba14809bc564e9a20a88019e8de468caf6d710c405ef9d5a44ffR47-R48):
Added a placeholder description comment in the documentation section.

Author: MariusStorhaug

.github/PSModule.yml

@@ -19,3 +19,12 @@ Test:
 # Build:
 #   Docs:
 #     Skip: true
+Linter:
+  env:
+    VALIDATE_BIOME_FORMAT: false
+    VALIDATE_BIOME_LINT: false
+    VALIDATE_GITHUB_ACTIONS_ZIZMOR: false
+    VALIDATE_JSCPD: false
+    VALIDATE_JSON_PRETTIER: false
+    VALIDATE_MARKDOWN_PRETTIER: false
+    VALIDATE_YAML_PRETTIER: false

.github/linters/.markdown-lint.yml

@@ -8,18 +8,20 @@
 ###############
 # Rules by id #
 ###############
-MD004: false                  # Unordered list style
+MD004: false # Unordered list style
 MD007:
-  indent: 2                   # Unordered list indentation
+  indent: 2 # Unordered list indentation
 MD013:
-  line_length: 808            # Line length
+  line_length: 808 # Line length
+MD024:
+  siblings_only: true # Allow duplicate headings in different sections
 MD026:
-  punctuation: ".,;:!。，；:"  # List of not allowed
-MD029: false                  # Ordered list item prefix
-MD033: false                  # Allow inline HTML
-MD036: false                  # Emphasis used instead of a heading
+  punctuation: '.,;:!。，；:' # List of not allowed
+MD029: false # Ordered list item prefix
+MD033: false # Allow inline HTML
+MD036: false # Emphasis used instead of a heading
 
 #################
 # Rules by tags #
 #################
-blank_lines: false  # Error on blank lines
+blank_lines: false # Error on blank lines

src/functions/public/Functions/Get-AstFunctionName.ps1

@@ -44,13 +44,14 @@
         .OUTPUTS
         System.String
 
+        The names of functions found in the PowerShell script.
+
         .NOTES
         The name of each function found in the PowerShell script.
 
         .LINK
         https://psmodule.io/Ast/Functions/Functions/Get-AstFunctionName/
     #>
-
     [CmdletBinding()]
     param (
         # The name of the command to search for. Defaults to all commands ('*').