haxelib: add "install", "uninstall", and "list" examples (#7288)

pages/common/haxelib.md

@@ -11,6 +11,10 @@
 
 `haxelib install {{libname}}`
 
+- Install a specific version of a Haxe library:
+
+`haxelib install {{libname}} {{version}}`
+
 - Upgrade all installed Haxe libraries:
 
 `haxelib upgrade`
@@ -18,3 +22,11 @@
 - Install the development version of a library from a Git repository:
 
 `haxelib git {{libname}} {{git_url}}`
+
+- Uninstall a Haxe library:
+
+`haxelib remove {{libname}}`
+
+- Print a tree of locally installed Haxe libraries:
+
+`haxelib list`