module: add :tools tree-sitter

This module installs 'tree-sitter' and 'tree-sitter-langs' as well as
the 'evil-textobj-treesitter' and configures them.

This module is based on the prototype module that @hlissner has started
and I am just fleshing out that work.

It also comes with a README file

Fix: #4151

modules/tools/tree-sitter/test.js

@@ -0,0 +1,52 @@
+// this is a test file i am useing to test functionallity with treesitter
+
+// blocks
+x = 10
+
+// calls
+call();
+
+// class
+class Car {
+  constructor(name, year) {
+    this.name = name;
+    this.year = year;
+  }
+  age(x) {
+    return x - this.year;
+  }
+}
+
+// comments
+/*
+ * multiline my dude
+ * a poem
+ * roses are red
+ * violets are blue
+ * there is a man behind you
+ * and he had an axe with him to
+ */
+
+
+// conditional
+if (x == 1) {
+  doStuff();
+} else {
+  x = new Car.age(2020)
+}
+
+
+// function
+function name(arg) {
+  doStuff(arg);
+}
+
+const arrowFunc = arg => {
+  dosStuff(arg);
+}
+
+// loop
+for (let i = 0; i <= 10; i++) {
+  doStuff(i);
+}
+// param