feat(plugins): plugin API 1.4 (#2207)

Plugin API 1.4: grants for unencrypted HTTP, local sockets, IDE commands and owned database sources; window status items, output channels, content tabs, editor selections, decorations, search, Problems and VCS reads; runs, keyed terminals with exit events, plugin run targets, dynamic run configurations and test parsers; language features, injections, snippets and menu locations; plugin MCP tools on the built-in server; four official API examples. Released 1.3 plugins keep working.

plugins/official/string-tools/dist/plugin.wasm.sources

@@ -1 +1 @@
-f4e37cdac925f376bac945d5bb86c648b559787aa22737e6440835456f9f74cf
+867fc7bba0e795155e96c39f5a05cc3a08a3b6809c4e3922437e393d65f6d829