feat: Add copilot add script

.gitignore

@@ -1,10 +1,4 @@
 /build
 /lake-packages/*
 .lake/packages/*
-.lake/build
+.lake/build
-# Section: To be ignored, except when updating Lean and MathLib versions
-.lake/lakefile.olean
-.lake/lakefile.olean.trace
-lake-manifest.json
-lakefile.lean
-# End Section.

scripts/add-copilot.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+
+cp ./scripts/copilot_lakefile.txt lakefile.lean
+
+lake update LeanCopilot 
+
+lake exe LeanCopilot/download
+
+lake build 
+
+echo ".........................................................................."
+echo "Please do not push changes to the following files: lakefile.lean, .lake/lakefile.olean, 
+    .lake/lakefile.olean.trace, lake-manifest.json."

scripts/copilot_lakefile.txt

@@ -0,0 +1,23 @@
+import Lake
+open Lake DSL
+
+package «hep_lean» {
+  -- add any package configuration options here
+}
+
+require mathlib from git
+  "https://github.com/leanprover-community/mathlib4.git"
+
+@[default_target]
+lean_lib «HepLean» {
+  -- add any library configuration options here
+  moreLinkArgs := #[
+    "-L./.lake/packages/LeanCopilot/.lake/build/lib",
+    "-lctranslate2"
+  ]
+}
+
+meta if get_config? env = some "dev" then -- dev is so not everyone has to build it
+require «doc-gen4» from git "https://github.com/leanprover/doc-gen4" @ "main"
+
+require LeanCopilot from git "https://github.com/lean-dojo/LeanCopilot.git" @ "v1.2.1"