Add SVG version of the Bazel logo 
Add SVG version of the Bazel logo 

Added in the site folder, next to the other logos.
Logo has been converted from original .ai file using Inkscape and cleaned up using SVGO.

Fix #2382

Closes #2395.

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Reviewed-on: https://github.com/bazelbuild/bazel/pull/2395
PiperOrigin-RevId: 145394926
MOS_MIGRATED_REVID=145394926

davidzchen/bazel-website,bazelbuild/bazel-website,bazelbuild/bazel-website,davidzchen/bazel-website,davidzchen/bazel-website,davidzchen/bazel-website,bazelbuild/bazel-website