docs: console key binding docs and example

docs/src/content/tools-mitmproxy.md

@@ -16,3 +16,21 @@ kept in memory, which means that it's intended for taking and manipulating
 small-ish samples. Use the `?` shortcut key to view, context-sensitive
 documentation from any **mitmproxy** screen.
 
+### Key binding configuration
+
+Mitmproxy's key bindings can be customized through in the
+`~/.mitmproxy/keys.yaml` file. This file consists of a sequence of maps, with
+the following keys:
+
+* `key` (**mandatory**): The key to bind.
+* `cmd` (**mandatory**): The command to execute when the key is pressed.
+* `context`: A list of contexts in which the key should be bound. By default this is **global** (i.e. the key is bound everywhere). Valid contexts are `chooser`, `commands`, `dataviewer`, `eventlog`, `flowlist`, `flowview`, `global`, `grideditor`, `help`, `keybindings`, `options`.
+* `help`: A help string for the binding which will be shown in the key binding browser.
+
+#### Example
+
+{{< example src="examples/keys.yaml" lang="yaml" >}}
+
+
+
+

examples/keys.yaml

@@ -0,0 +1,11 @@
+-
+  # Simple global binding
+  key: ctrl a
+  cmd: replay.client @marked
+-
+  # Bind key only in the lfowlist
+  # Note that 1 is quoted, or YAML interprets it as a digit
+  key: "1"
+  ctx: ["flowlist"]
+  cmd: console.nav.down
+  help: Go to next flow