plugins/treesitter: move nvim-treesitter-context to its own dir

modules/plugins/treesitter/ts-context/context.nix

@@ -0,0 +1,60 @@
+{lib, ...}: let
+  inherit (lib.options) mkOption mkEnableOption;
+  inherit (lib.types) int bool str nullOr enum;
+in {
+  options.vim.treesitter.context = {
+    enable = mkEnableOption "context of current buffer contents [nvim-treesitter-context] ";
+
+    maxLines = mkOption {
+      type = int;
+      default = 0;
+      description = "How many lines the window should span. Values <=0 mean no limit.";
+    };
+
+    minWindowHeight = mkOption {
+      type = int;
+      default = 0;
+      description = "Minimum editor window height to enable context. Values <= 0 mean no limit.";
+    };
+
+    lineNumbers = mkOption {
+      type = bool;
+      default = true;
+      description = "";
+    };
+
+    multilineThreshold = mkOption {
+      type = int;
+      default = 20;
+      description = "Maximum number of lines to collapse for a single context line.";
+    };
+
+    trimScope = mkOption {
+      type = enum ["inner" "outer"];
+      default = "outer";
+      description = "Which context lines to discard if [](#opt-vim.treesitter.context.maxLines) is exceeded.";
+    };
+
+    mode = mkOption {
+      type = enum ["cursor" "topline"];
+      default = "cursor";
+      description = "Line used to calculate context.";
+    };
+
+    separator = mkOption {
+      type = nullOr str;
+      default = null;
+      description = ''
+        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.
+      '';
+    };
+
+    zindex = mkOption {
+      type = int;
+      default = 20;
+      description = "The Z-index of the context window.";
+    };
+  };
+}