docs: update opencode-morph-fast-apply to opencode-morph-plugin in all languages

Extends #16634 (which only updated English) to all 18 localized
ecosystem pages. Replaces the old opencode-morph-fast-apply entry
with opencode-morph-plugin, which bundles Fast Apply editing, WarpGrep
codebase search, and context compaction into a single OpenCode plugin.