nvim: add psoxizsh.entrypoint.profile

These are simple "prebaked" functions that can modify the PsoxizshConfig
object before it is utilized further.

It allows the primary users of this repo to have seperate "profiles"
that they can maintain in the main code base, while also allowing others
to just pass a similiar function to PsoxizshConfig.profile.

nvim/lua/psoxizsh/entrypoint/profile/bazaah.lua

@@ -0,0 +1 @@
+return function(_) end

nvim/lua/psoxizsh/entrypoint/profile/psox.lua

@@ -0,0 +1,16 @@
+
+local function psox_keybinds()
+  local keys = require 'psoxizsh.key.binds'
+
+  -- Use Ctrl-Shift-<Arrow> for movement
+  keys.Global.NavigateUp.Key    = '<C-S-Up>'
+  keys.Global.NavigateLeft.Key  = '<C-S-Left>'
+  keys.Global.NavigateRight.Key = '<C-S-Right>'
+  keys.Global.NavigateDown.Key  = '<C-S-Down>'
+end
+
+local function psox(config)
+  config.keybinds = psox_keybinds
+end
+
+return psox