Rework level 2 __repr__s for consistency with level 1

[SolarDrew]

Closes #675

Scraps the basic repr for Inversion and Profiles, which is currently a slight variation on the NDCollection repr, and replaces it with a more detailed one based on the info string developed previously for Dataset and TiledDataset.

[codspeed-hq]

Merging this PR will degrade performance by 10.66%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

❌ 3 regressed benchmarks
✅ 13 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	test_dataset_repr	14.4 ms	16.9 ms	-14.77%
❌	Simulation	test_tileddataset_repr[simple-masked]	6.2 ms	6.8 ms	-8.58%
❌	Simulation	test_tileddataset_repr[simple-nomask]	6.3 ms	6.9 ms	-8.48%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing SolarDrew:inv-repr (dd3fb81) with main (e71f49b)¹}

Footnotes

1. No successful run was found on main (3e0636d) during the generation of this report, so e71f49b was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[SolarDrew]

Example Inversion repr:

<dkist.dataset.inversion.Inversion object at 0x7f13b0b4c4a0>
This Level 2 product is a dictionary of 11 Datasets with 3 aligned dimensions and consists of 4664 total frames.
Files are stored in /home/drew/oss-projects/dkist/dkist/data/test

This Inversion has ID ...

The Datasets in this Inversion represent the following 11 physical parameters:
- optical_depth
- temperature
- electron_pressure
- microturbulence
- mag_strength
- velocity
- mag_inclination
- mag_azimuth
- geo_height
- gas_pressure
- density

These parameters were calculated using the following 3 line profiles (see the .profiles attribute for more information) :
- NaID
- FeI630
- CaII854

These Datasets share 3 pixel and 5 world dimensions.The shared pixel axes have shape [424, 508, 81].

Array Dim  Axis Name      Data size  Bounds
        0  frame_y             None  None
        1  slit_x              None  None
        2  optical_depth       None  None

World Dim  Axis Name                Physical Type                   Units
        4  stokes                   phys.polarization.stokes        unknown
        3  isot(utc; None           time                            s
        2  pos.helioprojective.lat  custom:pos.helioprojective.lat  arcsec
        1  pos.helioprojective.lon  custom:pos.helioprojective.lon  arcsec
        0  optical depth            phys.absorption.opticalDepth    pixel

Correlation between pixel and world axes:

                        |                PIXEL DIMENSIONS
       WORLD DIMENSIONS | optical_depth |     slit_x    |    frame_y
----------------------- | ------------- | ------------- | -------------
          optical depth |       x       |               |
pos.helioprojective.lon |               |       x       |       x
pos.helioprojective.lat |               |       x       |       x
         isot(utc; None |               |               |       x
                 stokes |               |       x       |

The above WCS information relates to only the pixel axes shared by all inversions, and the
corresponding world axes. Invdividual inversions may include other coordinate information.