Add Halo Rounded

Font Project Git Repo URL: https://github.com/ali8082ventures/halo-rounded

Halo Rounded

**Super short description of the Font Family:**
Halo Rounded is a friendly rounded sans-serif for display use — headlines, apps, packaging, and playful brand identities. Variable font with a Weight axis from Light (300) to Bold (700), covering the GF Latin Core glyphset. Designed by Catherine Bellot and published by Glyphline. Disclosure: the letterforms were generated programmatically (parametric construction) with the assistance of AI tools, then reviewed and corrected manually.

**Requirements:**

By opening this issue, I confirm the project meets the following requirements:
- [x] The entire font project is available in a Github repository (repo) and licensed under the [OFL](https://openfontlicense.org/open-font-license-official-text/)
- [x] The source files are available in the repo
- [x] I am the sole copyright author of the entire project, or all other copyright authors have licensed their work to me under the OFL, and I commit to clearly disclosing if AI tools were used in the creation of this project.
- [x] There are no "Reserved Font Names" in the OFL license information, or in the project documentation of any known upstream projects. If there are RFNs, they are not used in whole or in part in this family name, or, I want to discuss how Google can work with my use of them.
- [x] The family name is unique according to [namecheck.fontdata.com](https://namecheck.fontdata.com/)
- [x] The name of the font family expected to appear on app menus must be very clearly communicated and definitive. It should not include any copyright holder's full names or acronyms.
- [x] The font supports at least the Google Fonts 'Latin Core' glyphset from [github.com/googlefonts/glyphsets](https://github.com/googlefonts/glyphsets) ([direct link](https://github.com/googlefonts/glyphsets/blob/main/data/results/txt/nice-names/GF_Latin_Core.txt))
- [x] The repo has the [Google Fonts preferred upstream repo structure](https://googlefonts.github.io/gf-guide/upstream.html)
- [x] I have read, agree with, and comply with, the full [Google Fonts contributing requirements](https://googlefonts.github.io/gf-guide/index#pre-production-getting-your-fonts-ready-for-gf)
- [x] I will maintain the repository and participate in the onboarding process (addressing, solving, and responding to issues, merging pull requests, etc)

Start with the Halo Rounded upstream repository at https://github.com/ali8082ventures/halo-rounded and compare its source files, OFL licensing, glyph coverage, and structure with the linked Google Fonts contributing requirements. Review the font metadata and onboarding expectations first; the work is done when the project satisfies those requirements and is accepted into Google Fonts.

Written by the indexing model from the issue text.