feat: Add GitHub Sponsors integration

- Add .github/FUNDING.yml for GitHub Sponsors button
- Add sponsorship section to README with badge
- Manifest already has fundingUrl configured

This enables the GitHub Sponsors button on the repository and
provides clear sponsorship information for users who want to
support the plugin's development.

.github/FUNDING.yml

@@ -0,0 +1,13 @@
+# These are supported funding model platforms
+
+github: [aaronsb]
+# 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

@@ -539,6 +539,14 @@ npm run build
 - **Issues**: [GitHub Issues](https://github.com/aaronsb/obsidian-mcp-plugin/issues)
 - **Discussions**: [GitHub Discussions](https://github.com/aaronsb/obsidian-mcp-plugin/discussions)
 
+## Sponsorship
+
+If you find this plugin useful, please consider supporting its development:
+
+[![GitHub Sponsors](https://img.shields.io/badge/Sponsor-%E2%9D%A4-red?logo=github)](https://github.com/sponsors/aaronsb)
+
+Your support helps maintain and improve this plugin!
+
 ## License
 
 MIT