Restructure modules/shared and update all imports

- Delete 2024-12-rework/ folder
- Rename modules/hosts/common to modules/shared, then split into:
  - modules/shared/home/general
  - modules/shared/home/linux
  - modules/shared/nixos
- Update all import paths throughout the codebase
- Update lib/*.nix to use new paths
- Fix hardcoded /Users/${username} to use config.home.homeDirectory
- Update README and examples/flake-structure.nix

modules/hosts/common/files/nvim/lua/plugins/bufferline.lua

@@ -1,49 +0,0 @@
-return {
-  "akinsho/bufferline.nvim",
-  after = "catppuccin",
-  dependencies = { "nvim-tree/nvim-web-devicons" },
-  version = "*",
-  config = function()
-    -- Get the color pallet of the theme flavor I am using
-    local color_palette = require("catppuccin.palettes").get_palette("frappe")
-
-    -- Set variables to use the color they'd use if the background was not transparent
-    local bg_highlight = color_palette.crust
-    local separator_fg = color_palette.crust
-
-    require("bufferline").setup({
-      highlights = require("catppuccin.groups.integrations.bufferline").get({
-        -- Copy settings from Catppuccin bufferline integration and override just the
-        -- part that is  needed to make it look like it would if the background was not
-        -- set to transparent in catppuccin.lua
-        -- https://github.com/catppuccin/nvim/blob/main/lua/catppuccin/groups/integrations/bufferline.lua
-        custom = {
-          all = {
-            -- this makes the background behind the tabs contrast with the tabs themselves
-            fill = { bg = bg_highlight },
-
-            -- separators
-            -- I am only overriding the foreground as that is what makes the tabs look correct
-            separator = { fg = separator_fg },
-            separator_visible = { fg = separator_fg },
-            separator_selected = { fg = separator_fg },
-            offset_separator = { fg = separator_fg },
-          },
-        },
-      }),
-      options = {
-        mode = "buffers",
-        separator_style = "slant",
-        offsets = {
-          {
-            filetype = "neo-tree",
-            text = "File Explorer",
-            highlight = "Directory",
-            separator = true,
-          },
-        },
-        diagnostics = "nvim_lsp",
-      },
-    })
-  end,
-}