feat: add config get/set/unset helpers

docs/cli/config.md

@@ -0,0 +1,41 @@
+---
+summary: "CLI reference for `clawdbot config` (get/set/unset config values)"
+read_when:
+  - You want to read or edit config non-interactively
+---
+
+# `clawdbot config`
+
+Config helpers: get/set/unset values by path. Run without a subcommand to open
+the configure wizard (same as `clawdbot configure`).
+
+## Examples
+
+```bash
+clawdbot config get browser.executablePath
+clawdbot config set browser.executablePath "/usr/bin/google-chrome"
+clawdbot config set agents.defaults.heartbeat.every "2h"
+clawdbot config unset tools.web.search.apiKey
+```
+
+## Paths
+
+Paths use dot or bracket notation:
+
+```bash
+clawdbot config get agents.defaults.workspace
+clawdbot config get agents.list[0].id
+```
+
+## Values
+
+Values are parsed as JSON5 when possible; otherwise they are treated as strings.
+Use `--json` to require JSON5 parsing.
+
+```bash
+clawdbot config set agents.defaults.heartbeat.every "0m"
+clawdbot config set gateway.port 19001 --json
+clawdbot config set channels.whatsapp.groups '["*"]' --json
+```
+
+Restart the gateway after edits.