Regex anchors don't work for filtering

[wholegrainloaf]

Describe the bug
When using ^ and $ regex anchors, the filtering no longer works and returns an empty list instead of actually matching on resource names.

To Reproduce
Steps to reproduce the behavior:

1. Go to a resource list
2. Click on / to start filtering
3. Enter a regex filter like ^fancyPants
4. Expect to see resources with names that start with fancyPants, but actually nothing shows up.
5. Enter a regex filter like fancyPants
6. Resources with that substring in their name show up, including ones that start with it

Historical Documents
N/A

Expected behavior
Resources matching the regex should show up since the k9s docs say:

Regex2 supported

Screenshots
N/A

Versions (please complete the following information):

• OS: OSX Sonoma 14.x.x
• K9s: 0.32.5
• K8s: 1.3x.x

Additional context
N/A

[derailed]

Resource filtering in k9s is very generic. User may want to filter on name but also ips, nodes, etc... for a given resource.
The way search currently works is by flattening out rows and grepping on that.
RX anchors tho supported are not effective here given the current strategy.