Can't paste from clipboard into the search filter

[nick4eva]

Problem

When filtering a resource list (e.g. EC2 instances with /), pasting from the
clipboard does nothing. If I've copied an instance ID from somewhere, I have to
retype it by hand — for IDs like i-0123456789abcdef0 that's slow and easy to
get wrong.

Neither paste route works:

• Ctrl+Shift+V / tmux paste — the terminal sends the text as a bracketed
  paste, which Bubble Tea delivers as tea.PasteMsg. The filter views only
  forward tea.KeyPressMsg to their text input, so the paste message is
  dropped.
• Ctrl+V — the bubbles textinput supports this out of the box: it
  responds with a command that reads the system clipboard and emits an internal
  paste message. That message also gets dropped by the views, so the text is
  never inserted.

Steps to reproduce

1. Copy an EC2 instance ID to the clipboard
2. claws -s ec2
3. Press / to open the filter
4. Press Ctrl+V or Ctrl+Shift+V

Expected: the instance ID appears in the filter and the list narrows.
Actual: nothing happens.

Proposed fix

Forward paste and other textinput-bound messages to the filter input while it
is focused. This applies to every view with a filter (resource browser, service
browser, log view, tag search, multi-select dialogs) and to the : command
prompt. Both paste routes then work, including inside tmux and over SSH
(bracketed paste needs no clipboard tooling on the host).

I have a working implementation with tests and will open a PR.