opencode: SearXNG search MCP, LSP tool, Gitea MCP in oc-local

searxng-mcp.py is a stdlib-only stdio MCP server with one web_search tool
against search.rcjohnstone.com. It is in both profiles and asks first on
oc-work.

lsp: true in opencode.json, and the launcher sets
OPENCODE_EXPERIMENTAL_LSP_TOOL and OPENCODE_DISABLE_LSP_DOWNLOAD.

The launcher adds gitea-mcp to oc-local through OPENCODE_CONFIG_CONTENT when
the binary and GITEA_MCP_TOKEN exist, limited to 15 tools.
gitea_issue_write asks.

common/opencode/opencode.json

@@ -3,6 +3,7 @@
   "enabled_providers": [
     "litellm"
   ],
+  "lsp": true,
   "agent": {
     "plan": {
       "disable": true