Create a workspace management tool.

I want a cli written to manage workspaces in a directory

cli features

* list workspaces
  * workspace name
  * workspace description (read from the readme, everything after the h1 title)
  * included repos, with ascii/int ahead/behind/dirty indicators
* add repos to a workspace (default workspace to current workspace)
  * use iterfzf to pick repo
  * list all directories in repos_dir as a repo
  * checkout a worktree on branch with the name of the workspace into the
    workspace with the repo_name
* list repos and branch on a current workspace
  * repo name (should also be directory name)
  * use ascii/int ahead/behind/dirty indicators for git status
* create new workspace
  * ask for a name and description
  * name will be the directory name
  * make a readme with format `# <name>\n\n<description>`


configuration

* get workspaces_name from flag / settings / environment variable / default
  WORKSPACES_DIR
  * workspaces_name defaults to git
  * repos_dir = ~/workspaces_name
  * workspaces_dir = ~/workspaces_name + ".workspaces"
* workspaces will be two sibling directories, 
  * allow me to specify the workspaces name ex: work, personal, git, with a
    flag to any command, fallback to env WORKSPACES_DIR, fallback to default
  * repos_dir with all repos I work on, I will keep it clean default to ~/git
  * workspaces_dir that I do work from that contains the workspace and a
    collection of worktrees checked out from the repo in the repos_dir default
    to ~/git.workspaces

fuzzy picker

* iterfzf is a python library that comes with fzf for fuzzy picking things
``` python
from iterfzf import iterfzf
metadata = { "key": "value" }
tables = metadata.tables.keys()
table_name = iterfzf(tables, prompt="pick a table")
```

directory layout

repos_dir
  repo1
  repo2
  repo3
  ...
workspaces_dir
  workspace1
    readme.md
    repo1 (worktree)
    repo2 (worktree)
  workspace2
    readme.md
    repo2 (worktree)
    repo3 (worktree)
  ...

use the format for uv scripts as shown below. use typer for the cli, rich
console and rich table for cli output, pydantic-settings for settings.

#!/usr/bin/env -S uv run --quiet --script
# /// script
# requires-python = ">=3.12"
# dependencies = [
#     "typer",
#     "rich",
#     "pydantic",
#     "pydantic-settings",
# ]
# ///