Path: Opt into automatic git newline normalization

[gwicke]

Avoid spurious diffs from inadvertent newline changes by letting git
normalize newlines in the path module as well, just as a list of other
modules including Draft already do.

This effectively standardizes all checked-in code to Unix newlines, but
checkouts might use CRLF if that is the user preference. Thanks to @vocx-fc
for pointing me to the existing .gitattributes setup in the discussion on #3496.

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• Branch rebased on latest master git pull --rebase upstream master
• Unit tests confirmed to pass by running ./bin/FreeCAD --run-test 0
• Commit message is well-written
• Commit message includes issue #<id> or fixes #<id> where <id> is the associated MantisBT issue id if one exists

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---

[gwicke]

Downside of the normalization is that other outstanding PRs will initially conflict on those newline changes after this diff has landed. However, I believe git might help fix this up by automatically applying the normalization on rebase.

[gwicke]

Rebased onto 30dcafc (current master).

[gwicke]

Rebased the latest manually. Diff ignoring the whitespace changes:

git diff -b master
diff --git a/src/Mod/.gitattributes b/src/Mod/.gitattributes
index 4b723a0c4..52d7eefe6 100644
--- a/src/Mod/.gitattributes
+++ b/src/Mod/.gitattributes
@@ -77,6 +77,7 @@ JtReader    export-ignore
 # Fem/** -text
 # Material/** -text
 # OpenSCAD/** -text
+# Path/** -text
 # Show/** -text
 # Tux/** -text

@@ -97,7 +98,6 @@ Mesh/** -text
 MeshPart/** -text
 Part/** -text
 PartDesign/** -text
-Path/** -text
 Plot/** -text
 Points/** -text
 Raytracing/** -text