fix: restore plugins/matrix-plugin/ path structure for OpenCode V2 plugin loading

- Add plugins/matrix-plugin/ directory with symlinks to root files
  (OpenCode V2 resolver appends path suffix after symlink resolution)
- Rename plugin id from 'opencode-matrix' to 'matrix-plugin'

index.ts

@@ -458,7 +458,7 @@ async function v2Setup(ctx: any) {
 // OpenCode 1.18.x calls server(PluginInput, options) where PluginInput contains SDK client.
 // V2 reads id + setup() and ignores server().
 export default {
-  id: "opencode-matrix",
+  id: "matrix-plugin",
   async setup(ctx: any) {
     const isV2 = isV2Context(ctx)
     if (isV2) {

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "opencode-matrix-plugin",
+  "name": "matrix-plugin",
   "version": "1.0.0",
   "type": "module",
   "description": "OpenCode V2 plugin for Matrix messaging integration",

plugins/matrix-plugin/config-loader.ts

@@ -0,0 +1 @@
+../../config-loader.ts

plugins/matrix-plugin/index.ts

@@ -0,0 +1 @@
+../../index.ts

plugins/matrix-plugin/logger.ts

@@ -0,0 +1 @@
+../../logger.ts

plugins/matrix-plugin/matrix-client.ts

@@ -0,0 +1 @@
+../../matrix-client.ts

plugins/matrix-plugin/package.json

@@ -0,0 +1 @@
+../../package.json

plugins/matrix-plugin/session-manager.ts

@@ -0,0 +1 @@
+../../session-manager.ts

plugins/matrix-plugin/tsconfig.json

@@ -0,0 +1 @@
+../../tsconfig.json

plugins/matrix-plugin/types.ts

@@ -0,0 +1 @@
+../../types.ts