feat(k8s): add k8s_wait_for_condition tool

[mesutoezdil]

Adds a new MCP tool k8s_wait_for_condition that wraps kubectl wait and blocks until a Kubernetes resource reaches a specified condition or the timeout expires.

Agents that deploy resources currently have to poll with repeated kubectl get calls in a loop. Each iteration is a full LLM turn, wasting tokens and adding latency.

With this tool, a single blocking call replaces the loop:

Before:

[turn 1] kgp -n default   -> Pending
[turn 2] kgp -n default   -> Pending
[turn 3] kgp -n default   -> Running

After:

[turn 1] k8s_wait_for_condition deployment/myapp condition=Available -> condition met

Parameter	Required	Default	Description
resource_type	yes		deployment, pod, job, etc.
resource_name	yes		Name of the resource
condition	yes		Available, Ready, Complete, etc.
namespace	no	default	Namespace of the resource
timeout_seconds	no	60	Max wait time in seconds

Seven unit tests cover: success path, custom namespace and timeout, missing required parameters, zero timeout rejection, and kubectl timeout propagation.

Closes #56