refactor: improve error codes and remove duplicities

[cristianIOHK]

Signed-off-by: Cristian G cristian.castro@iohk.io

Description:

This PR improves the error codes. Each component has its numeric identifier Apollo 1, Castor 2, Mercury 3, Pluto 4, Pollux 5 and Agent 6. That makes it easier to identify where the error comes from.
Some of the errors were merged together as they represent the same concept.

Checklist:

• My PR follows the contribution guidelines of this project
• My PR is free of third-party dependencies that don't comply with the Allowlist
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked the PR title to follow the conventional commit specification

[github-actions]

Unit Test Results

145 tests  ±0   142 ✅ ±0   7s ⏱️ ±0s
 25 suites ±0     3 💤 ±0 
 25 files   ±0     0 ❌ ±0 

Results for commit 6529c5b. ± Comparison against base commit 52c3895.

♻️ This comment has been updated with latest results.

[coveralls]

Pull Request Test Coverage Report for Build 10269286420

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 67 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.04%) to 43.141%

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Files with Coverage Reduction	New Missed Lines	%
org/hyperledger/identus/walletsdk/edgeagent/EdgeAgentError.kt	16	25.0%
org/hyperledger/identus/walletsdk/edgeagent/EdgeAgent.kt	51	68.48%

Totals
Change from base Build 10184204750:	0.04%
Covered Lines:	3006
Relevant Lines:	6103

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💛 - Coveralls