[Tooling][Localnet] Add k9s to the localnet dev container with updated doc and make targets (#418)

## 🌿 Summary

Add k9s Kubernetes dashboard tool to the localnet development container
with enhanced tooling and documentation.

This allows `k9s` to always be accessible on any machine that runs the
PATH localnet dev container without needing to install additonal
dependencies.

_See screenshot:_
<img width="3720" height="644" alt="Screenshot 2025-08-26 at 11 28 04"
src="https://github.com/user-attachments/assets/97aec44c-d5f3-4cce-bb99-039a75fd1fe9"
/>

### 🌱 Primary Changes:
- Install k9s in the localnet dev container with cross-platform support
for amd64 and arm64 architectures
- Add new make target `localnet_k9s` for launching k9s inside the
running container
- Update localnet script to display k9s usage information in the
development tools section

### 🍃 Secondary changes:
- Remove deprecated `k8s_prepare_local_env` make target that was
replaced by improved cluster management
- Add proper error handling to ensure localnet container is running
before attempting to use k9s
- Enhance developer documentation with clear instructions for accessing
k9s debugging tool

## 🛠️ Type of change

Select one or more from the following:

- [x] New feature, functionality or library

---------

Co-authored-by: Daniel Olshansky <olshansky.daniel@gmail.com>

Author: commoddity

docusaurus/docs/develop/path/2_cheatsheet_pocket.md

@@ -44,7 +44,9 @@ In `./local/path/.config.yaml`:
 
 ### 3. Download the guard `.values.yaml`
 
+```bash
 op item get fkltz2wb7fegpumntqyo3w5qau --fields notesPlain --format json | jq -r '.value' > ./local/path/.values.yaml
+```
 
 ### 4. Skip to Section 4
 
@@ -287,6 +289,12 @@ Make sure this reflects both of the following:
 
 ## 4. Run PATH Stack Locally
 
+:::tip PATH LocalNet
+
+Find more about feature available for local development of [PATH](./4_path_localnet.md).
+
+:::
+
 ### 4.1 Run & Monitor PATH
 
 Run the following command and wait 1-2 minutes: