developer_bleed: replaces float_bleed and decays vectors too

There never was a vector bleed, so the consolidation is the float node
made type-aware: a vector is scaled componentwise by one minus the
amount, keeping its direction. The Attribute field now lists the input's
point attributes, the tab menu entry sits under Developer, and help is
added. No hip in the repo or the open scene used the old type.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

 otls/sop_lsgalante.developer_bleed.1.0.hdalc       | Bin 0 -> 6847 bytes
 otls/sop_lsgalante.developer_float_bleed.1.0.hdalc | Bin 6271 -> 0 bytes
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diff --git a/otls/sop_lsgalante.developer_bleed.1.0.hdalc b/otls/sop_lsgalante.developer_bleed.1.0.hdalc
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diff --git a/otls/sop_lsgalante.developer_float_bleed.1.0.hdalc b/otls/sop_lsgalante.developer_float_bleed.1.0.hdalc
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