Simplify CLI execution result handling

[prd-fox]

Update PicoCLI dependency to latest release version.

Simplifies the retrieval of the CliResult from the execution of CLI args by gathering all executed subcommands and seeing if any had a result, picking the first (we only ever do at most 1 execution anyway).

[codecov-io]

Codecov Report

Merging #902 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #902      +/-   ##
============================================
- Coverage     99.37%   99.37%   -0.01%     
+ Complexity     2094     2092       -2     
============================================
  Files           318      318              
  Lines          5777     5776       -1     
  Branches        309      307       -2     
============================================
- Hits           5741     5740       -1     
  Misses            5        5              
  Partials         31       31

Impacted Files	Coverage Δ	Complexity Δ
.../main/java/com/quorum/tessera/cli/CliDelegate.java	100% <100%> (ø)	10 <2> (-2)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a7d035e...106c652. Read the comment docs.