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/work.json

@@ -124,9 +124,17 @@
   "instructions": [
     "~/.dotfiles/common/opencode/instructions/work.md"
   ],
+  "mcp": {
+    "searxng": {
+      "type": "local",
+      "command": ["python3", "{env:HOME}/.dotfiles/common/opencode/mcp/searxng-mcp.py"],
+      "enabled": true
+    }
+  },
   "permission": {
     "edit": "ask",
     "webfetch": "ask",
+    "searxng_*": "ask",
     "external_directory": "ask",
     "read": {
       "*": "allow",