Migration script: handle versioning with hatch

[jtpio]

Problem

The migration script currently defines some tbump configuration by default:

hatch-jupyter-builder/hatch_jupyter_builder/migrate/_migrate.py

Lines 172 to 191 in ba9f6fe

	# Handle versioning with tbump - allows for static versioning and makes
	# it easier to use jupyter_releaser.
	data["project"]["version"] = current_version
	data["project"].pop("dynamic", None)
	tbump_table = tool_table.setdefault("tbump", {})
	tbump_table["version"] = dict(
	current=current_version,
	regex=r"""
	(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)((?P<channel>a|b|rc|.dev)(?P<release>\d+))?
	""".strip(),
	)
	tbump_table["git"] = dict(message_template=r"Bump to {new_version}", tag_template=r"v{new_version}")
	tbump_table["field"] = [dict(name="channel", default=""), dict(name="release", default="")]
	tbump_table["file"] = [
	dict(
	src="pyproject.toml",
	version_template='version = "{major}.{minor}.{patch}{channel}{release}"',
	)
	]

Proposed Solution

Since hatch supports versioning, it could be interesting to use hatch by default instead.

Additional context

Spotted when using the migration script recently.

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