nvim config edits, rename 'old_configs' -> 'non-nix_configs'

modules/non-nix_configs/nvim/after/plugin/ts-context.lua

@@ -0,0 +1,13 @@
+require'treesitter-context'.setup{
+  enable = true, -- Enable this plugin (Can be enabled/disabled later via commands)
+  max_lines = 0, -- How many lines the window should span. Values <= 0 mean no limit.
+  min_window_height = 0, -- Minimum editor window height to enable context. Values <= 0 mean no limit.
+  line_numbers = true,
+  multiline_threshold = 20, -- Maximum number of lines to collapse for a single context line
+  trim_scope = 'outer', -- Which context lines to discard if `max_lines` is exceeded. Choices: 'inner', 'outer'
+  mode = 'cursor',  -- Line used to calculate context. Choices: 'cursor', 'topline'
+  -- Separator between context and content. Should be a single character string, like '-'.
+  -- When separator is set, the context will only show up when there are at least 2 lines above cursorline.
+  separator = nil,
+  zindex = 20, -- The Z-index of the context window
+}