docs: add jagmandan as a contributor for code (#140)

Adds @jagmandan as a contributor for code.

This was requested by bourquep [in this
comment](https://github.com/bourquep/mysa-js-sdk/pull/139#issuecomment-3369095675)

[skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -0,0 +1,26 @@
+{
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "commitType": "docs",
+  "commitConvention": "angular",
+  "contributors": [
+    {
+      "login": "jagmandan",
+      "name": "jagmandan",
+      "avatar_url": "https://avatars.githubusercontent.com/u/227265405?v=4",
+      "profile": "https://github.com/jagmandan",
+      "contributions": [
+        "code"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7,
+  "skipCi": true,
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "projectName": "mysa-js-sdk",
+  "projectOwner": "bourquep"
+}

README.md

@@ -1,4 +1,7 @@
 # Mysa Smart Thermostat JavaScript SDK
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 [![NPM Version](https://img.shields.io/npm/v/mysa-js-sdk)](https://www.npmjs.com/package/mysa-js-sdk)
 [![CodeQL](https://github.com/bourquep/mysa-js-sdk/actions/workflows/github-code-scanning/codeql/badge.svg)](https://github.com/bourquep/mysa-js-sdk/actions/workflows/github-code-scanning/codeql)
@@ -229,3 +232,25 @@ For general questions and discussions, join our [Discussion Forum](https://githu
 This library would not be possible without the amazing work by [@dlenski](https://github.com/dlenski) in his
 [mysotherm](https://github.com/dlenski/mysotherm) repository. He's the one who reversed-engineered the Mysa MQTT
 protocol which is being used by this library.
+
+## Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tbody>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/jagmandan"><img src="https://avatars.githubusercontent.com/u/227265405?v=4?s=100" width="100px;" alt="jagmandan"/><br /><sub><b>jagmandan</b></sub></a><br /><a href="https://github.com/bourquep/mysa-js-sdk/commits?author=jagmandan" title="Code">💻</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!