feat(powershell): add gitattributes to prevent lint issues for powershell users (#1661)

.gitattributes

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+# Set default behavior to automatically normalize line endings
+* text=auto eol=lf
+
+# Explicitly declare text files you want to always be normalized and converted
+# to native line endings on checkout
+*.ts text eol=lf
+*.tsx text eol=lf
+*.js text eol=lf
+*.jsx text eol=lf
+*.json text eol=lf
+*.md text eol=lf
+*.yml text eol=lf
+*.yaml text eol=lf
+*.toml text eol=lf
+*.css text eol=lf
+*.scss text eol=lf
+*.sh text eol=lf
+*.bash text eol=lf
+Dockerfile* text eol=lf
+.dockerignore text eol=lf
+.gitignore text eol=lf
+.gitattributes text eol=lf
+
+# Denote all files that are truly binary and should not be modified
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.ico binary
+*.woff binary
+*.woff2 binary
+*.ttf binary
+*.eot binary
+*.pdf binary