[neovim] replace neo-tree with snacks.nvim

Replace neo-tree.nvim with snacks.nvim for file explorer functionality and
remove several other plugins including:
- mini-animate
- mini-starter
- indent-blankline

The snacks.nvim plugin provides better file explorer, dashboard, indentation
guides, and other UI improvements in a more cohesive package.

Also removed the large file autocommand as snacks.nvim handles this with its
bigfile module.

.config/nvim/lua/core/keymaps.lua

@@ -193,14 +193,10 @@ keymap("i", "jk", "<ESC>", vim.tbl_extend("force", opts, { desc = "Exit insert m
 keymap("v", "<", "<gv", opts)
 keymap("v", ">", ">gv", opts)
 
--- NeoTree
-keymap("n", "<leader>e", ":Neotree toggle<cr>", vim.tbl_extend("force", opts, { desc = "Toggle Neotree" }))
-keymap(
-	"n",
-	"<leader>gg",
-	":Neotree float git_status<cr>",
-	vim.tbl_extend("force", opts, { desc = "Open a float window with the git status" })
-)
+-- FileTree
+keymap("n", "<leader>e", function()
+	Snacks.explorer()
+end, vim.tbl_extend("force", opts, { desc = "Toggle file explorer" }))
 
 -- Telescope
 keymap(
@@ -234,7 +230,7 @@ keymap(
 	vim.tbl_extend("force", opts, { desc = "Open a Telescope prompt to show all commands" })
 )
 
--- Gitdiff
+-- Git
 keymap(
 	"n",
 	"<leader>df",
@@ -242,6 +238,13 @@ keymap(
 	vim.tbl_extend("force", opts, { desc = "Open diff view file history for the current buffer" })
 )
 keymap("n", "<leader>dc", ":DiffviewClose<cr>", vim.tbl_extend("force", opts, { desc = "Close diff view" }))
+-- Git
+keymap({ "n", "v" }, "<leader>go", function()
+	Snacks.gitbrowse()
+end, vim.tbl_extend("force", opts, { desc = "Git Browse" }))
+keymap("n", "<leader>gg", function()
+	Snacks.picker.git_status()
+end, vim.tbl_extend("force", opts, { desc = "Git Status" }))
 
 -- Projects
 keymap(