Earthmover

<details>
<summary>Released 2024-07-12</summary>

* feature: add `earthmover init` command to initialize a new sample project in the expected bundle structure
* internal: expand test run to include the new `debug` and `flatten` operations, as well as a nested JSON source file
* internal: improve customization in write behavior in new file destinations
* bugfix: Fix bug when writing null values in `FileDestination`

</details>

<details>
<summary>Released 2024-06-26</summary>

* hotfix: Fix bug when writing out JSON in `FileDestination`

</details>

<details>
<summary>Released 2024-06-18</summary>

* hotfix: Resolve incompatible package dependencies
* hotfix: Fix type casting of nested JSON for destination templates

</details>

<details>

<summary>Released 2024-06-14</summary>

* feature: Add `DebugOperation` for logging data head, tail, columns, or metadata midrun
* feature: Add `FlattenOperation` for splitting and exploding string columns into values
* feature: Add optional 'fill_missing_columns' field to `UnionOperation` to fill disjunct columns with nulls, instead of raising an error (default `False`)
* feature: Add `git_auth_timeout` config when entering Git credentials during package composition
* feature: [Add `earthmover clean` command that removes local project artifacts](https://github.com/edanalytics/earthmover/pull/87)
* feature: only output compiled template during `earthmover compile`
* feature: Render full row into JSON lines when `template` is undefined in `FileDestination`
* internal: Move `FileSource` size-checking and `FtpSource` FTP-connecting from compile to execute
* internal: Move template-file check from compile to execute in `FileDestination`
* internal: Allow filepaths to be passed to an optional `FileSource`, and check for file before creating empty dataframe
* internal: Build an empty dataframe if an empty folder is passed to an optional `FileSource`
* internal: fix some examples in README
* internal: remove GitPython dependency
* bugfix: fix bug in `FileDestination` where `linearize: False` resulted in BOM characters
* bugfix: fix bug where nested JSON would be loaded as a stringified Python dictionary
* bugfix: [Ensure command list in help menu and log output is always consistent](https://github.com/edanalytics/earthmover/pull/87)
* bugfix: fix bug in `ModifyColumnsOperation` where `__row_data__` was not exposed in Jinja templating

</details>

<details>

<summary>Released 2024-04-26</summary>

* internal: allow any ordering of Transformations during graph-building in compile
* internal: only create a `/packages` dir when `earthmover deps` succeeds

</details>

<details>

<summary>Released 2024-04-17</summary>

* feature: add project composition using `packages` keyword in template file (see README)
* feature: add installation extras for optional libraries, and improve error logging to notify which is missing
* feature: `GroupByWithRankOperation` cumulatively sums record counts by group-by columns
* feature: setting `log_level: DEBUG` in template configs or setting `debug: True` for a node displays the head of the node mid-run
* feature: add `optional_fields` key to all Sources to add optional empty columns when missing from schema
* feature: add optional `ignore_errors` and `exact_match` boolean flags to `DateFormatOperation`
* internal: force-cast a dataframe to string-type before writing as a Destination
* internal: remove attempted directory-hashing when a source is a directory (i.e., Parquet)
* internal: refactor project to standardize import paths for Node and Operation
* internal: add `Node.full_name` attribute and `Node.set_upstream_source()` method
* internal: unify graph-building into compilation
* internal: refactor compilation and execution code for cleanliness
* internal: unify `Node.compile()` into initialization to ease Node development
* internal: Remove unused `group_by_with_count` and `group_by_with_agg` operations

</details>