Claiming namespace [laplace-lang]

### Namespace

laplace-lang

### Ownership

- [x] The namespace is not currently owned on Open VSX (verify by a search on [open-vsx.org](https://open-vsx.org))

### Account Age

- [x] The GitHub ID making this request has at least 12 months of public history

### VS Code Publisher with Repo

- [ ] The namespace is also a publisher account on the VS Code Marketplace (check by browsing https://marketplace.visualstudio.com/publishers/{publisher}) and has an extension published there with a repo specified in its package.json file.

### VS Code Publisher without Repo

- [ ] The namespace is also a publisher account on the VS Code Marketplace and does not have published extensions or has published extensions with no GitHub repos.

### Not a VS Code Marketplace Publisher

- [ ] The namespace is not a publisher account on the VS Code Marketplace

### All Other Cases

- [x] You are unable to provide the inputs required in the three options above. This option will take the longest to process.

### Claim evidence

I am the sole author and maintainer of the laplace project, a
source-to-source preprocessor/compiler for the Stan probabilistic
programming language:

- Compiler: https://github.com/mlatinov/laplace
- Editor tooling (this extension): https://github.com/mlatinov/laplace_tools

The namespace "laplace-lang" corresponds to the project name
("laplace") with a "-lang" suffix, a common convention for
language-tooling namespaces (e.g. rust-lang, python-lang).

This project is not published on the VS Code Marketplace, and I do
not have a dedicated project domain.

Start with the namespace claim in issue #13092, then verify laplace-lang on open-vsx.org and inspect the corresponding publisher page on the VS Code Marketplace. No repository files or tests are mentioned; done means the ownership evidence is verified and the namespace claim is processed.

Written by the indexing model from the issue text.