Orcfax prep work and cleanup, e.g. search, and simpler wallet handling

[ross-spencer]

Small fixes that will help with the Orcfax piece over the coming weeks plus further testing of Arweave's capabilities.

• Provide a helper function to return all Txs - We also return wallet address in a handful of requests so that the output is clearer and easier to query outside of the API. Requirements haven't been updated in a while and so they are updated here.
• We can now upload tags and search by those.
• A filename can be submitted with a package.
• Lots of cleanup.
• Better tagging of endpoints.
• Wallet arguments are now separate from file upload.
• FORM endpoints have been removed in favor of a tagged release for Landano.

NB. show where a module is installed with: pip show arweave-python-client

Also considered in this fix:

• arql fixes for python-arweave-lib MikeHibbert/arweave-python-client#38
• Ensure that arql query returns transaction list xloem/pyarweave#4

NB. After looking at the newer Xloem fork, it is still less stable than arweave-python so we have stuck with that.

Example using tags:

curl -X 'POST' \
  'http://127.0.0.1:8002/create_transaction/?package_file_name=x-file-name_arkly_00000000-0000-0000-0000-000000000000' \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -F 'wallet=@myWallet.json;type=application/json' \
  -F 'files=@hello_world' \
  -F 'tags={
    "tags": [
        {
        "name": "file-name",
        "value": "x-file-name_arkly_00000000-0000-0000-0000-000000000000"
        },
        {
        "name": "x-urn",
        "value": "x-urn:arkly:00000000-0000-0000-0000-000000000000"
        },
        {
        "name": "x-id",
        "value": "00000000-0000-0000-0000-000000000000"
        },
        {
        "name": "x-tag",
        "value": "arkly hello world!"
        }
    ]
}'