Basic Local Recording

[schacon]

The client needs to record everything happening in the working directory. We decided this would be via git commits of the state of the working tree (tracked and untracked files) along with metadata of the crdt deltas from the last tree to this one.

Each commit will happen when there is at least 5 minutes of no changes, or every hour at maximum. We will also record metadata about the session.

The tree structure linked to by each commit will look like this:

- wd/
   - README.md
   - lib/
     - config.rb
   [etc]
- session/
  - meta/
    - session-start (timestamp)
    - session-last (timestamp)
    - branch (branch name)
    - commit (last commit sha) 
  - deltas/
    - README.md (crdt data, with git blob SHA as base)
    - lib/
      - config.rb (crdt data)  

This should be done by a Rust watcher process per project, spawned and managed by the client.