refactor!: remove unnecessary tasks_show and close_input commands

[sxyazi]

The tasks_show and close_input commands were introduced for cross-layer command invocation:

• [manager] calls the [tasks]'s show command to open the task manager
• [cmp] calls the [input]'s close command to close the input after completion

With #2399, Yazi now supports cross-layer command invocation in a more comprehensive and unified manner, making these two commands unnecessary.

⚠️ Breaking changes

tasks_show has been replaced by tasks:show:

# keymap.toml
[manager]
- { on = "w", run = "tasks_show" },
+ { on = "w", run = "tasks:show" },

close_input has been replaced by input:close:

# keymap.toml
[cmp]
- { on = "<Enter>", run = [ "close --submit", "close_input --submit" ] },
+ { on = "<Enter>", run = [ "close --submit", "input:close --submit" ] },