MAINT: First pass at a TOML output

TODO(haozeke): revisit with plugins

asv.conf.toml

@@ -0,0 +1,66 @@
+# The version of the config file format. Do not change, unless
+# you know what you are doing.
+version = 1
+
+# The name of the project being benchmarked
+project = "asv"
+
+# The project's homepage
+project_url = "https://github.com/airspeed-velocity/asv/"
+
+# The URL or local path of the source code repository for the
+# project being benchmarked
+repo = "."
+
+# List of branches to benchmark. If not provided, defaults to "main"
+# (for git) or "default" (for mercurial).
+branches = ["main"]  # for git
+
+# The DVCS being used. If not set, it will be automatically
+# determined from "repo" by looking at the protocol in the URL
+# (if remote), or by looking for special directories, such as
+# ".git" (if local).
+dvcs = "git"
+
+# The tool to use to create environments. May be "conda",
+# "virtualenv", "mamba" (above 3.8)
+# or other value depending on the plugins in use.
+# If missing or the empty string, the tool will be automatically
+# determined by looking for tools on the PATH environment
+# variable.
+environment_type = "virtualenv"
+
+# The base URL to show a commit for the project.
+show_commit_url = "http://github.com/airspeed-velocity/asv/commit/"
+
+# The Pythons you'd like to test against. If not provided, defaults
+# to the current version of Python used to run `asv`.
+pythons = ["3.12"]
+
+# The directory (relative to the current directory) that benchmarks are stored in.
+# If not provided, defaults to "benchmarks"
+# benchmark_dir = "benchmarks"
+
+# The directory (relative to the current directory) to cache the Python
+# environments in. If not provided, defaults to "env"
+env_dir = ".asv/env"
+
+# The directory (relative to the current directory) that raw benchmark
+# results are stored in. If not provided, defaults to "results".
+results_dir = ".asv/results"
+
+# The directory (relative to the current directory) that the html tree
+# should be written to. If not provided, defaults to "html".
+html_dir = ".asv/html"
+
+# The matrix of dependencies to test.  Each key is the name of a
+# package (in PyPI) and the values are version numbers.  An empty
+# list or empty string indicates to just test against the default
+# (latest) version. null indicates that the package is to not be
+# installed. If the package to be tested is only available from
+# PyPi, and the 'environment_type' is conda, then you can preface
+# the package name by 'pip+', and the package will be installed via
+# pip (with all the conda available packages installed first,
+# followed by the pip installed packages).
+[matrix.req]
+six = []