feat(loader): handle hyphens in file names when deactivating

[MeanderingProgrammer]

Description

When deactivating plugins vim.g.loaded_ variables are cleared based on a common pattern plugins use to avoid multiple initializing. The current logic handles most cases, except when a lua file has a hyphen, in which case it is unlikely to clear the correct variable.

Examples

Plugin / File	Current	Actual
nvim-treesitter / nvim-treesitter.lua	loaded_nvim-treesitter	loaded_nvim_treesitter
neo-tree.nvim / neo-tree.lua	loaded_neo-tree	loaded_neo_tree
lsp-zero.nvim / lsp-zero.lua	loaded_lsp-zero	loaded_lsp_zero
fzf-lua / fzf-lua.lua	loaded_fzf-lua	loaded_fzf_lua
cellular-automaton.nvim / cellular-automaton.lua	loaded_cellular-automaton	loaded_cellular_automaton
rest.nvim / rest-nvim.lua	loaded_rest-nvim	loaded_rest_nvim
rainbow-delimiters.nvim / rainbow-delimiters.lua	loaded_rainbow-delimiters	loaded_rainbow_delimiters
cosmic-ui / cosmic-ui.lua	loaded_cosmic-ui	loaded_cosmic_ui
compiler-explorer.nvim / compiler-explorer.lua	loaded_compiler-explorer	loaded_compiler_explorer
vim-coach.nvim / vim-coach.lua	loaded_vim-coach	loaded_vim_coach
cd-project.nvim / cd-project.lua	loaded_cd-project	loaded_cd_project
nvim-rooter.lua / nvim-rooter.lua	loaded_nvim-rooter	loaded_nvim_rooter
telescope-alternate.nvim / telescope-alternate.lua	loaded_telescope-alternate	loaded_telescope_alternate
diagnostic-hover.nvim / diagnoistic-hover.lua	loaded_diagnostic-hover	loaded_diagnostic_hover

[!NOTE] I looked through the first 10 pages of top and trending plugins from dotfyle and the results of a targeted github search I found no counter examples, if the plugin file had a hyphen and used a vim.g.loaded_ variable, the variable always used underscores instead