feat: revamp core configuration for improved customizability

lua/lazy_setup.lua

@@ -1,6 +1,7 @@
 require("lazy").setup({
   {
     "AstroNvim/AstroNvim",
+    version = "^5", -- Remove version tracking to elect for nightly AstroNvim
     import = "astronvim.plugins",
     opts = { -- AstroNvim options must be set here with the `import` key
       mapleader = " ", -- This ensures the leader key must be configured before Lazy is set up
@@ -14,7 +15,7 @@ require("lazy").setup({
   { import = "plugins" },
 } --[[@as LazySpec]], {
   -- Configure any other `lazy.nvim` configuration options here
-  install = { colorscheme = { "cyberdream" } },
+  install = { colorscheme = { "astrotheme", "habamax" } },
   ui = { backdrop = 100 },
   performance = {
     rtp = {