feat: add Memory record TUI

[notgitika]

This PR adds TUI implementation to the memory record list and get commands implemented in PR #1895

PR #1906 adds the event TUI. Stacks on top of the both of them.

The flow:
Adds Memory selection followed by namespace scope entry. Supports namespace and namespace-path.

It lists records with content, strategy, and creation timeand opens up selected event as an entire JSON. Pagination, filtering, retries, empty states, and back navigation is implemented.

I tested this myself + using the TUI harness skill.

Typcheck, lint, build and test passes

[codecov-commenter]

Codecov Report

❌ Patch coverage is 97.32143% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.19%. Comparing base (206540c) to head (2977abb).

Files with missing lines	Patch %	Lines
src/handlers/memory/record/list/screen.tsx	96.77%	5 Missing ⚠️
src/handlers/memory/record/screen.tsx	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           refactor    #1908      +/-   ##
============================================
+ Coverage     96.17%   96.19%   +0.02%     
============================================
  Files           236      239       +3     
  Lines         11778    11999     +221     
============================================
+ Hits          11328    11543     +215     
- Misses          450      456       +6     

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