refactor: ✨ (#418)

* refactor: ✨ move in one commit

Eveything in modules should probably be changed to `exported` defs.
The idea is to move everything first to keep proper history.

* refactor: 📝 add modules readme (wip)

* refactor: ✨ small move

* refactor: 📝 changed nestring, updated modules readme

* refactor: 📝 to document or not to document

* fix: 🐛 themes

replaced the template to use `main` and regenerated them
from lemnos themes.

* Revert "fix: 🐛 themes"

This reverts commit 4918d3633c8d2d81950a0ed0cfd9eb84241bc886.

* refactor: ✨ introduce sourced

- Created a source `root` in which sourcable demos are stored.
  Some might get converted to modules later on.
- Moved some files to bin too.

* fix: 🐛 fehbg.nu

* fix: 🐛 modules/after.nu

* moved some other stuff around

---------

Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>

modules/nvim/nvim.nu

@@ -0,0 +1,143 @@
+## neovim configurations
+# local vcs_root = require('lspconfig.util').root_pattern('.git/')
+# function HookPwdChanged(after, before)
+#     vim.b.pwd = after
+#     local git_dir = vcs_root(after)
+#     vim.api.nvim_command('silent tcd! '..(git_dir or after))
+# end
+
+# function OppositePwd()
+#     local tab = vim.api.nvim_get_current_tabpage()
+#     local wins = vim.api.nvim_tabpage_list_wins(tab)
+#     local cwin = vim.api.nvim_tabpage_get_win(tab)
+#     for _, w in ipairs(wins) do
+#         if cwin ~= w then
+#             local b = vim.api.nvim_win_get_buf(w)
+#             local pwd = vim.b[b].pwd
+#             if pwd then return pwd end
+#         end
+#     end
+# end
+
+# function ReadTempDrop(path, action)
+#     vim.api.nvim_command(action or 'botright vnew')
+#     local win = vim.api.nvim_get_current_win()
+#     local buf = vim.api.nvim_create_buf(true, true)
+#     vim.api.nvim_win_set_buf(win, buf)
+#     vim.api.nvim_command('read '..path)
+#     vim.fn.delete(path)
+# end
+
+
+def nvim_tcd [] {
+    [
+        {|before, after|
+            if not ($env.NVIM? | is-empty) {
+                nvim --headless --noplugin --server $env.NVIM --remote-send $"<cmd>lua HookPwdChanged\('($after)', '($before)')<cr>"
+            }
+        }
+    ]
+}
+
+export-env {
+    let-env config = ( $env.config | upsert hooks.env_change.PWD { |config|
+        let o = ($config | get -i hooks.env_change.PWD)
+        let val = (nvim_tcd)
+        if $o == $nothing {
+            $val
+        } else {
+            $o | append $val
+        }
+    })
+}
+
+def edit [action file] {
+    if ($env.NVIM? | is-empty) {
+        nvim $file
+    } else {
+        let af = ($file | each {|f|
+            if ($f|str substring ..1) in ['/', '~'] {
+                $f
+            } else {
+                $"($env.PWD)/($f)"
+            }
+        })
+        let cmd = $"<cmd>($action) ($af|str join ' ')<cr>"
+        nvim --headless --noplugin --server $env.NVIM --remote-send $cmd
+    }
+}
+
+# nvim tcd
+export def tcd [path?: string] {
+    let after = if ($path | is-empty) {
+        $env.PWD
+    } else {
+        $path
+    }
+    nvim --headless --noplugin --server $env.NVIM --remote-send $"<cmd>lua HookPwdChanged\('($after)', '($env.PWD)')<cr>"
+}
+
+export def e [...file: string] {
+    if ($file|is-empty) {
+        nvim
+    } else {
+        edit vsplit $file
+    }
+}
+
+export def c [...file: string] {
+    if ($file|is-empty) {
+        nvim
+    } else {
+        edit split $file
+    }
+}
+
+export def v [...file: string] {
+    if ($file|is-empty) {
+        nvim
+    } else {
+        edit vsplit $file
+    }
+}
+
+export def x [...file: string] {
+    if ($file|is-empty) {
+        nvim
+    } else {
+        edit tabnew $file
+    }
+}
+
+# drop stdout to nvim buf
+export def drop [] {
+    if ($env.NVIM? | is-empty) {
+        echo $in
+    } else {
+        let c = $in
+        let temp = (mktemp -t nuvim.XXXXXXXX|str trim)
+        $c | save -f $temp
+        nvim --headless --noplugin --server $env.NVIM --remote-send $"<cmd>lua ReadTempDrop\('($temp)')<cr>"
+    }
+}
+
+export def nvim-lua [...expr: string] {
+    if ($env.NVIM? | is-empty) {
+        echo "not found nvim instance"
+    } else {
+        nvim --headless --noplugin --server $env.NVIM --remote-send $'<cmd>lua vim.g.remote_expr_lua = ($expr|str join " ")<cr>'
+        do -i { nvim --headless --noplugin --server $env.NVIM --remote-expr 'g:remote_expr_lua' } | complete | get stderr
+    }
+}
+
+export def opwd [] {
+    nvim-lua 'OppositePwd()'
+}
+
+export def nvim-srv [port: int=1111] {
+    nvim --headless --listen $"0.0.0.0:($port)"
+}
+
+export def nvide-conn [addr: string] {
+    neovide --multigrid --maximized --remote-tcp addr
+}