fix(command): normalize reveal_file path argument

[Renerick]

I found that when using neo-tree with project.nvim, when changing cwd via project selector, reveal argument doesn't work, the file is not focused upon opening the tree. Turns out, project.nvim normalizes disk names on Windows to lower case

https://github.com/ahmedkhalf/project.nvim/blob/8c6bad7d22eef1b71144b401c9f74ed01526a4fb/lua/project_nvim/utils/history.lua#L32-L34

As a result, switching directories via project.nvim on Windows results in all file paths having lower case drive letter

Meanwhile, neo-tree normalizes drive names to upper case

neo-tree.nvim/lua/neo-tree/utils/init.lua

Lines 792 to 793 in 120a83e

	-- normalize the drive letter to uppercase
	path = path:sub(1, 1):upper() .. path:sub(2)

But it doesn't do so for reveal_file argument. Since normalized file names are used as case sensitive ids, neo-tree is unable to find file to reveal and just does nothing.

The issue can be trivially reproduced by running :cd c:\[directory] with drive letter in lower case and trying to open neo-tree with reveal argument (or relative path in reveal_file argument).

This fix applies same normalization process to the input parameter, eliminating possible discrepancies.

[cseickel]

Looks good, thanks!