Filemanager with plugins support

[rdmitry0911]

• [x ] This PR is not from my main or master branch 💩, but a separate branch ✅
• [x ] Each commit has a valid ✒️ Signed-off-by: <my@email.address> row (via git commit --signoff)
• [x ] Each commit and PR title has a valid 📝 <package name>: title first line subject for packages
• [x ] Incremented 🆙 any PKG_VERSION in the Makefile
• [ ramips/mt7621, x86/64, OpenWrt 23.05.2 Chrome, Firefox ] Tested on: (architecture, openwrt version, browser) ✅
• ( Preferred ) Mention: @ the original code author for feedback
• [x ] ( Preferred ) Screenshot or mp4 of changes:
• ( Optional ) Closes: e.g. openwrt/luci#issue-number
• ( Optional ) Depends on: e.g. openwrt/packages#pr-number in sister repo
• [Extendable File Manager with plugins support. The only required modules are file-plug-manager and Navigation plugin. All other modules are optional. Navigation now supports all file operations, drag'n'drop of a single/multiple files and copy/move files with drag'n'drop to a folders inside OpenWrt filesystem ] Description: (describe the changes proposed in this PR)