Implement pencil and line tool

Cargo.lock

@@ -1952,6 +1952,7 @@ name = "mspaint"
 version = "0.1.0"
 dependencies = [
  "iced",
+ "iced_core",
 ]
 
 [[package]]
@@ -3575,9 +3576,9 @@ checksum = "f6ccf251212114b54433ec949fd6a7841275f9ada20dddd2f29e9ceea4501493"
 
 [[package]]
 name = "unicode-width"
-version = "0.2.2"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4ac048d71ede7ee76d585517add45da530660ef4390e49b098733c6e897f254"
+checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
 
 [[package]]
 name = "unicode-xid"