Add a command line interface

[greglucas]

This adds a very basic command line interface and prints the header contents of a file to the terminal. I figured this would be easier to discuss as a prototype rather than opening an issue.

I've currently implemented this with just basic built-in argparse utilities, but I'm wondering if we should add some other dependencies to make the cli a little nicer? The two that have caught my eye are:

• Rich: https://github.com/Textualize/rich for color/formatting
• Click: https://github.com/pallets/click for a decorator based approach to defining the cli in a cleaner manner.

I don't keep up with all of the cli/formatting libraries, so if there are others I should look at let me know. These libraries don't have any other dependencies which is nice as well, so they would each only add their dependency and they are both lightweight and heavily used.

Example of the current output, which could definitely be spruced up and made to look nicer, but I wanted to just put this up quick as an example to get feedback on the approach.

Packet file: idex-many-files.bin
Number of packets: 46800
VERSION     | TYPE        | SEC_HDR_FLG | PKT_APID    | SEQ_FLGS    | SRC_SEQ_CTR | PKT_LEN     | 
           0|            0|            1|         1424|            3|            0|          297| 
           0|            0|            1|         1424|            3|            1|         4073| 
           0|            0|            1|         1424|            3|            2|         4073| 
           0|            0|            1|         1424|            3|            3|         2901| 
           0|            0|            1|         1424|            3|            4|         4073| 
...
           0|            0|            1|         1424|            3|           73|         4073| 
           0|            0|            1|         1424|            3|           74|         2901| 
           0|            0|            1|         1424|            3|           75|         1065| 
           0|            0|            1|         1424|            3|           76|         1065| 
           0|            0|            1|         1424|            3|           77|         1065|

Checklist

• Changes are fully implemented without dangling issues or TODO items
• Deprecated/superseded code is removed or marked with deprecation warning
• Current dependencies have been properly specified and old dependencies removed
• New code/functionality has accompanying tests and any old tests have been updated to match any new assumptions
• The changelog.md has been updated

[greglucas]

I decided to give click and rich a try and I liked the results, so I pushed those changes up. I personally think it adds a nice touch to the cli capability and it is way easier to expand than argparse/optparse IMO.

You can test it out locally with these commands (with color locally):

spp describe-packets tests/test_data/idex/sciData_2023_052_14_45_05 
          tests/test_data/idex/sciData_2023_052_14_45_05: 78 packets          
┏━━━━━━━━━┳━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━┓
┃ VERSION ┃ TYPE ┃ SEC_HDR_FLG ┃ PKT_APID ┃ SEQ_FLGS ┃ SRC_SEQ_CTR ┃ PKT_LEN ┃
┡━━━━━━━━━╇━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━╇━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━┩
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 0           │ 297     │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 1           │ 4073    │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 2           │ 4073    │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 3           │ 2901    │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 4           │ 4073    │
│ ...     │ ...  │ ...         │ ...      │ ...      │ ...         │ ...     │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 73          │ 4073    │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 74          │ 2901    │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 75          │ 1065    │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 76          │ 1065    │
│ 0       │ 0    │ 1           │ 1424     │ 3        │ 77          │ 1065    │
└─────────┴──────┴─────────────┴──────────┴──────────┴─────────────┴─────────┘

spp describe-xtce tests/test_data/idex/idex_combined_science_definition.xml                      
╭───────────────────────── XTCE Container Layout ──────────────────────────╮
│ CCSDSPacket                                                              │
│ └── CCSDSTelemetryPacket [<Comparison VERSION==0>, <Comparison TYPE==0>] │
│     ├── IDX_SCI0 [<Comparison PKT_APID==1424>]                           │
│     │   ├── Sci0TypeZero [<Comparison IDX__SCI0TYPE==1>]                 │
│     │   └── Sci0TypeNonZero [<Comparison IDX__SCI0TYPE>1>]               │
│     └── IDX_SCIFETCH [<Comparison PKT_APID==1425>]                       │
│         ├── SciFetchTypeZero [<Comparison IDX__SCIFETCHTYPE==1>]         │
│         └── SciFetchTypeNonZero [<Comparison IDX__SCIFETCHTYPE>1>]       │
╰──────────────────────────────────────────────────────────────────────────╯

spp parse tests/test_data/idex/sciData_2023_052_14_45_05 tests/test_data/idex/idex_combined_science_definition.xml --packet 0      
{
    'VERSION': 0,
    'TYPE': 0,
    'SEC_HDR_FLG': 1,
    'PKT_APID': 1424,
    'SEQ_FLGS': 3,
    'SRC_SEQ_CTR': 0,
    'PKT_LEN': 297,
    'SHCOARSE': 1266,
    'SHFINE': 19198,
    'IDX__SCI0AID': 56026,
    'IDX__SCI0TYPE': 1,
    'IDX__SCI0CONT': 127,
    'IDX__SCI0SPARE1': 0,
    'IDX__SCI0PACK': 'EN',
    'IDX__SCI0FRAG': 'DS',
    'IDX__SCI0COMP': 'DS',
    'IDX__SCI0EVTNUM': 0,
    'IDX__SCI0CAT': 32,
    'IDX__SCI0QUAL': 5,
    'IDX__SCI0FRAGOFF': 0,
    ... +87
}