Fix UX Issues

[Gauthamastro]

Describe your changes

1. Solves https://github.com/Polkadex-Substrate/orderbook/issues/872
2. Swap deposit tokens for ED in PDEX automatically
3. Ability to pay withdrawal fees in tokens
4. Claim callable by anyone.

Issue ticket number and link

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• I removed all Clippy and Formatting Warnings.
• I added required Copyrights.

[Gauthamastro]

@zktony to add test cases for

• Swap for ED during deposit
• Swapping for withdrawal fees in Thea
• Check the situation when swap fails
• Check the situation when the full deposit/withdrawal amount is used by the swap

[serhii-temchenko]

CI is still failing, please take a look.

[codecov]

Codecov Report

Attention: 39 lines in your changes are missing coverage. Please review.

Comparison is base (5f0a92f) 36.12% compared to head (3d790b1) 36.11%.

Additional details and impacted files

@@             Coverage Diff             @@
##           Develop     #880      +/-   ##
===========================================
- Coverage    36.12%   36.11%   -0.01%     
===========================================
  Files           62       62              
  Lines         3693     3741      +48     
===========================================
+ Hits          1334     1351      +17     
- Misses        2359     2390      +31     

Files	Coverage Δ
pallets/ocex/src/benchmarking.rs	0.00% <ø> (ø)
pallets/ocex/src/lib.rs	69.32% <100.00%> (+0.29%)	⬆️
pallets/thea-executor/src/benchmarking.rs	0.00% <ø> (ø)
runtimes/mainnet/src/lib.rs	0.00% <0.00%> (ø)
primitives/polkadex/src/assets.rs	46.91% <0.00%> (-7.38%)	⬇️
pallets/thea-executor/src/lib.rs	63.31% <47.91%> (-6.26%)	⬇️

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[serhii-temchenko]

@zktony to add test cases for

• Swap for ED during deposit
• Swapping for withdrawal fees in Thea
• Check the situation when swap fails
• Check the situation when the full deposit/withdrawal amount is used by the swap

I assume this will be resolved in scope of the issue #881 and in different PR.
Approving.