Fix gha smells:

- Avoid running CI related actions when no source code has changed
- Avoid executing  scheduled workflows on forks
- Avoid jobs without timeouts

.github/workflows/api-docs.yml

@@ -4,6 +4,8 @@ on:
   push:
   # only publish v2 (main or develop); v2 is published via the Terminal.GuiV2Docs repo
     branches: [main, develop]
+    paths: 
+      - docfx/**
 
 permissions:
   id-token: write 

.github/workflows/codeql-analysis.yml

@@ -25,7 +25,7 @@ on:
 
 jobs:
   CodeQL-Build:
-
+    if: github.repository == 'gui-cs/Terminal.Gui'|| github.event_name == 'schedule'
     runs-on: ubuntu-latest
 
     steps:

.github/workflows/codeql.yml

@@ -29,6 +29,7 @@ jobs:
     # Consider using larger runners for possible analysis time improvements.
     runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
     timeout-minutes: ${{ (matrix.language == 'swift' && 120) || 360 }}
+    if: github.repository == 'gui-cs/Terminal.Gui'|| github.event_name == 'schedule'
     permissions:
       actions: read
       contents: read

.github/workflows/dotnet-core.yml

@@ -13,7 +13,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-
+    timeout-minutes: 10
     steps:
     - uses: actions/checkout@v4