fix: resolve PR conflicts with origin/main

- Remove .github/FUNDING.yml (upstream FreeCAD only, not Kindred)
- Sync .gitignore, .pre-commit-config.yaml, .pylintrc from origin/main
- Sync README.md, cMake/FindNETGEN.cmake from origin/main
- Sync pixi.lock, pixi.toml from origin/main
- Reset mods/ztools submodule pointer to match origin/main

.github/FUNDING.yml

@@ -1,11 +0,0 @@
-# These are supported funding model platforms
-
-github: FreeCAD
-open_collective: freecad
-patreon: # Replace with a single Patreon username
-ko_fi: # Replace with a single Ko-fi username
-tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
-community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
-issuehunt: # Replace with a single IssueHunt username
-otechie: # Replace with a single Otechie username
-custom: ["https://wiki.freecad.org/Donate"]