add Funding

Added installation instructions for the extension using PIE.

.github/FUNDING.yml

@@ -0,0 +1,13 @@
+# These are supported funding model platforms
+
+github: [macintoshplus] # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+# patreon: # Replace with a single Patreon username
+# open_collective: # Replace with a single Open Collective username
+# ko_fi: # Replace with a single Ko-fi username
+# tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+# community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+# liberapay: # Replace with a single Liberapay username
+# issuehunt: # Replace with a single IssueHunt username
+# otechie: # Replace with a single Otechie username
+# lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+# custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

README.md

@@ -34,6 +34,11 @@ Installation system support:
 | PECL     | no  :x:                |
 | PIE      | yes :white_check_mark: |
 
+To install the extension, use PIE (PHP Installer Extension) with a command like:
+
+```bash
+pie install php-win-ext/sync
+```
 
 Details
 -------
@@ -191,4 +196,4 @@ if ($mem->first())
 }
 
 $result = $mem->write(json_encode(array("name" => "my_report.txt")));
-```
+```