Support repeat window resize action

Is your feature request related to a problem? Please describe.
Currently, I can use commands like c-w + > to resize the window. However, to increase the size change, I have to repeated type c-w + [key] commands, which is a bit of tedious.

Describe the solution you'd like
It would be nice to be able to repeat the resize window action. For example, c-w + 3 + > will resize the window for three times. This is supported in vim.

Additional context
This issue has been raised in issue #2044, this commend. However, that issue has been closed and it seems that this commend went unnoticed. Therefore, I create a new issue here. Another not implemented feature mentioned in this commend is that c-w _ to maximize the current pane's height and c-w | to maximize the current pane's width.

Besides, the resize window feature c-w + > hasn't been mentioned in roadmap.

Start by reviewing the existing window-resize action and the related discussion in issue #2044, then compare the feature with ROADMAP.md. Define whether the scope is repeated resize commands only or also the proposed maximize actions, and verify completion against the requested Vim-style count behavior.