Update dependabot and package configurations

Added new patterns for analyzers, serilog, and nunit in the dependabot repository's configuration. Also corrected the NUnit package name in the Directory.Packages.props from "NUnit.Analyzers" to "NUnit.c". Additionally, added dependabot.yml to the CI solution project.

Author: arturcic

.github/dependabot.yml

@@ -43,6 +43,15 @@ updates:
       patterns:
       - "Microsoft.*"
       - "System.*"
+    analyzers:
+      patterns:
+      - "*Analyzers"
+    serilog:
+        patterns:
+        - "Serilog.*"
+    nunit:
+      patterns:
+      - "NUnit.*"
   directory: "/src"
   schedule:
     interval: daily

build/CI.sln

@@ -41,6 +41,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "workflows", "workflows", "{
 		..\.github\workflows\_unit_tests.yml = ..\.github\workflows\_unit_tests.yml
 		..\.github\workflows\stale.yml = ..\.github\workflows\stale.yml
 		..\.github\workflows\winget.yml = ..\.github\workflows\winget.yml
+		..\.github\dependabot.yml = ..\.github\dependabot.yml
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "actions", "actions", "{A9B92261-AB9C-47D6-A8A7-616A5A62B063}"